Log In
Merelani Hills, Lelatema Mountains, Simanjiro District, Manyara Region, Tanzaniai
| Regional Level Types | |
|---|---|
| Merelani Hills | Group of Hills |
| Lelatema Mountains | Mountain Range |
| Simanjiro District | District |
| Manyara Region | Region |
| Tanzania | Country |
This page kindly sponsored by Peter Slootweg
Get Involved with mindat.org
Mindat.org has grown through countless contributions from mineral enthusiasts, collectors, researchers and experts around the world — people just like you.
Want to take part?
1
2
3
4
Contribute
Add photos, locality information and knowledge
Every contribution helps make mindat.org better for everyone.
Latitude & Longitude (WGS84):
3° 34' 59'' South , 37° 0' 29'' East
Latitude & Longitude (decimal):
Type:
Group of Hills
Köppen climate type:
Other/historical names associated with this locality:
Mererani; Mirerani; Mererani Hills; Mirerani Hills
Name(s) in local language(s):
Merelani tanzanite mines (Mererani)
The Merelani tanzanite mines or Merelani gem mining area is an area 2 km wide and 50 km long. It is located in the Merelani Hills, on the slopes of the Lelatema Mountains, about 70 km southeast of the town of Arusha, where tanzanite was reportedly/allegedly first found in 1968.
Subdivided into four mining blocks (A, B, C, D) and additional mines.
Gem-quality tanzanite and grossular have been found to occur mainly in boudinaged pegmatitic veins and hydrothermal fracture fillings. These fracture fillings occur in brecciated and hydrothermally altered graphite-bearing gneiss in a mineral association containing glass-clear quartz, diopside, zoisite, graphite and calcite.
Gem-quality yellow-green to green diopside and tremolite contain traces of V and possibly Cr (Fritz et al., 2007).
Subdivided into four mining blocks (A, B, C, D) and additional mines.
Gem-quality tanzanite and grossular have been found to occur mainly in boudinaged pegmatitic veins and hydrothermal fracture fillings. These fracture fillings occur in brecciated and hydrothermally altered graphite-bearing gneiss in a mineral association containing glass-clear quartz, diopside, zoisite, graphite and calcite.
Gem-quality yellow-green to green diopside and tremolite contain traces of V and possibly Cr (Fritz et al., 2007).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded from this region.Mineral List
Mineral list contains entries from the region specified including sub-localities48 valid minerals. 3 (TL) - type locality of valid minerals.
Rock Types Recorded
Rock list contains entries from the region specified including sub-localities
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ Alabandite Formula: MnS Localities: Habit: octahedral, cubic, cuboctahedaral Colour: Grey, dark grey, grey-black to matt black |
| ⓘ Allanite-(Ce) Formula: (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH) Locality: D-Block Mine, Merelani Hills, Lelatema Mountains, Simanjiro District, Manyara Region, Tanzania References: |
| ⓘ 'Apatite' Formula: Ca5(PO4)3A References: |
| ⓘ 'Apophyllite Group' Formula: AB4[Si8O20]X · 8H2O |
| ⓘ Axinite-(Mg) (TL) Formula: Ca2MgAl2BSi4O15OH Localities: Fluorescence: Red |
| ⓘ Axinite-(Mn) Formula: Ca2Mn2+Al2BSi4O15(OH) Locality: D-Block Mine, Merelani Hills, Lelatema Mountains, Simanjiro District, Manyara Region, Tanzania References: |
| ⓘ Calcite Formula: CaCO3 |
| ⓘ 'Chabazite' |
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Clausthalite Formula: PbSe References: |
| ⓘ Clinochlore Formula: Mg5Al(AlSi3O10)(OH)8 References: |
| ⓘ Colusite Formula: Cu13VAs3S16 |
| ⓘ Diopside Formula: CaMgSi2O6 Localities: Colour: colorless, green Fluorescence: blue |
| ⓘ Diopside var. Chromium-bearing Diopside Formula: Ca(Mg,Cr)Si2O6 Locality: D-Block Mine, Merelani Hills, Lelatema Mountains, Simanjiro District, Manyara Region, Tanzania References: |
| ⓘ Dravite Formula: NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| ⓘ Fluorapatite Formula: Ca5(PO4)3F Localities: Colour: blue Description: see especially Rocks and Minerals 88(2), 179-183 (2013). |
| ⓘ Fluorite Formula: CaF2 Locality: D-Block Mine, Merelani Hills, Lelatema Mountains, Simanjiro District, Manyara Region, Tanzania Habit: cubeoctahedral Colour: colorless, purple |
| ⓘ Germanocolusite Formula: Cu26V2(Ge,As)6S32 References: |
| ⓘ Graphite Formula: C Localities: Reported from at least 7 localities in this region. Habit: tabular hexagonal with dominant pinacoids but notable lustrous prisms also noted. Colour: silvery gray Description: very common at the locality but some of world's best crystals were discovered in a pocket with diopside and fluorapatite in late 2007. See Rocks and Minerals 88(2) (2014). |
| ⓘ Gravegliaite Formula: Mn2+SO3 · 3H2O |
| ⓘ Grossular Formula: Ca3Al2(SiO4)3 |
| ⓘ Grossular var. Tsavorite Formula: Ca3Al2(SiO4)3 |
| ⓘ Gypsum Formula: CaSO4 · 2H2O |
| ⓘ Hematite Formula: Fe2O3 |
| ⓘ Heulandite-Ca Formula: (Ca,Na)5(Si27Al9)O72 · 26H2O |
| ⓘ 'Heulandite Subgroup' Formula: (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O Locality: D-Block Mine, Merelani Hills, Lelatema Mountains, Simanjiro District, Manyara Region, Tanzania References: |
| ⓘ Karelianite Formula: V3+2O3 |
| ⓘ Kyanite Formula: Al2(SiO4)O |
| ⓘ Laumontite Formula: CaAl2Si4O12 · 4H2O Habit: blocky Colour: white Description: associated with excellent gemmy green diopside and well-formed graphite crystals in an open pocket in December 2007 |
| ⓘ Merelaniite (TL) Formula: Mo4Pb4VSbS15 Type Locality: References: Jaszczak, John, Rumsey, Michael, Bindi, Luca, Hackney, Stephen, Wise, Michael, Stanley, Chris, Spratt, John (2016) Merelaniite, Mo4Pb4VSbS15, a New Molybdenum-Essential Member of the Cylindrite Group, from the Merelani Tanzanite Deposit, Lelatema Mountains, Manyara Region, Tanzania. Minerals, 6 (4). 115 doi:10.3390/min6040115 |
| ⓘ Mesolite Formula: Na2Ca2Si9Al6O30 · 8H2O Habit: acicular Colour: white Description: associated with excellent gemmy green diopside and well-formed graphite crystals in an open pocket in December 2007 |
| ⓘ Millerite Formula: NiS |
| ⓘ Molybdenite Formula: MoS2 |
| ⓘ Mukhinite Formula: (CaCa)(AlAlV3+)O[Si2O7][SiO4](OH) Description: Identified in epoxy mount FKM-26 as a single 50 micron rim surrounding an unidentified Cu-V-S mineral (sulvanite?), within massive vanadian tremolite (~1.7 wt% V) + calcite matrix. Additional minerals in sample include scattered phlogopite (~1.0 wt% V), minor clinochlore (~2 wt% V), minor quartz, minor goldmanite-grossular solid-solution, scattered graphite, minor vanadian titanite (~3.5 wt% V, and a minor unidentified Pb-V-As mineral. The mukhinite grain contains 9.25 wt% V and 3.3 wt% Cr. References: |
| ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 |
| ⓘ Muscovite var. Fuchsite Formula: K(Al,Cr)3Si3O10(OH)2 |
| ⓘ Native Sulphur Formula: S8 References: John A. Jaszczak collectionIdentified by John A. Jaszczak: SEM-EDS |
| ⓘ Pectolite Formula: NaCa2Si3O8(OH) References: |
| ⓘ Phlogopite Formula: KMg3(AlSi3O10)(OH)2 |
| ⓘ Phlogopite var. Vanadium-bearing phlogopite Formula: K(Mg,V3+)3(AlSi3O10)(OH)2 |
| ⓘ Prehnite Formula: Ca2Al2Si3O10(OH)2 |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Pyrrhotite Formula: Fe1-xS Colour: brassy Description: Confirmed by Raman, SEM-EDS, and XRD by J. A. Jaszczak 10/2013 |
| ⓘ Quartz Formula: SiO2 References: Jaszczak, John, Rumsey, Michael, Bindi, Luca, Hackney, Stephen, Wise, Michael, Stanley, Chris, Spratt, John (2016) Merelaniite, Mo4Pb4VSbS15, a New Molybdenum-Essential Member of the Cylindrite Group, from the Merelani Tanzanite Deposit, Lelatema Mountains, Manyara Region, Tanzania. Minerals, 6 (4). 115 doi:10.3390/min6040115 |
| ⓘ Rhodochrosite Formula: MnCO3 Localities: Colour: brown |
| ⓘ Richardsite (TL) Formula: Zn2CuGaS4 Type Locality: |
| ⓘ 'Scapolite' |
| ⓘ Scolecite Formula: CaAl2Si3O10 · 3H2O References: |
| ⓘ Siderite Formula: FeCO3 |
| ⓘ Sillimanite Formula: Al2(SiO4)O |
| ⓘ Sphalerite Formula: ZnS |
| ⓘ Stannite Formula: Cu2FeSnS4 |
| ⓘ 'Stilbite Subgroup' Formula: M6-7[Al8-9Si27-28O72] · nH2O |
| ⓘ Titanite Formula: CaTiO(SiO4) |
| ⓘ 'Tourmaline' Formula: AD3G6(T6O18)(BO3)3X3Z |
| ⓘ Tremolite Formula: ◻Ca2Mg5(Si8O22)(OH)2 |
| ⓘ Tremolite var. Chrome-Tremolite Formula: ◻{Ca2}{Mg5}(Si8O22)(OH)2 |
| ⓘ Wurtzite Formula: (Zn,Fe)S Localities: Habit: hexagonal Colour: orange brown Description: The partly translucent to transparent wurtzite crystals from Merelani are generally 2–3 cm in
size |
| ⓘ 'Wurtzite-4H' Formula: ZnS |
| ⓘ Zircon Formula: Zr(SiO4) Locality: D-Block Mine, Merelani Hills, Lelatema Mountains, Simanjiro District, Manyara Region, Tanzania Description: Only seen and analyzed via SEM-EDS. |
| ⓘ Zoisite Formula: (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) Localities: Reported from at least 7 localities in this region. Habit: Elongated prisms Colour: Blue, purple, pink, yellow, green or multi-colored |
| ⓘ Zoisite var. Tanzanite Formula: (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) Localities: Reported from at least 7 localities in this region. Description: Plates 79/80 from Wilson, Wendell. E.; Bartsch, Joel A.; Mauthner, Mark (2004) Masterpieces of the Mineral World. Houston Museum of Natural Science. [https://www.mindat.org/reference.php?id=18945017] |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Graphite | 1.CB.05a | C |
| ⓘ | Native Sulphur | 1.CC.05 | S8 |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Richardsite (TL) | 2.CB. | Zn2CuGaS4 |
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Stannite | 2.CB.15a | Cu2FeSnS4 |
| ⓘ | Colusite | 2.CB.30 | Cu13VAs3S16 |
| ⓘ | Germanocolusite | 2.CB.30 | Cu26V2(Ge,As)6S32 |
| ⓘ | Wurtzite | 2.CB.45 | (Zn,Fe)S |
| ⓘ | Pyrrhotite | 2.CC.10 | Fe1-xS |
| ⓘ | Millerite | 2.CC.20 | NiS |
| ⓘ | Alabandite | 2.CD.10 | MnS |
| ⓘ | Clausthalite | 2.CD.10 | PbSe |
| ⓘ | Molybdenite | 2.EA.30 | MoS2 |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| ⓘ | Merelaniite (TL) | 2.HF.25a | Mo4Pb4VSbS15 |
| Group 3 - Halides | |||
| ⓘ | Fluorite | 3.AB.25 | CaF2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Hematite | 4.CB.05 | Fe2O3 |
| ⓘ | Karelianite | 4.CB.05 | V3+2O3 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | Gravegliaite | 4.JE.05 | Mn2+SO3 · 3H2O |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| ⓘ | Rhodochrosite | 5.AB.05 | MnCO3 |
| ⓘ | Siderite | 5.AB.05 | FeCO3 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Gypsum | 7.CD.40 | CaSO4 · 2H2O |
| Group 8 - Phosphates, Arsenates and Vanadates | |||
| ⓘ | Fluorapatite | 8.BN.05 | Ca5(PO4)3F |
| Group 9 - Silicates | |||
| ⓘ | Grossular | 9.AD.25 | Ca3Al2(SiO4)3 |
| ⓘ | var. Tsavorite | 9.AD.25 | Ca3Al2(SiO4)3 |
| ⓘ | Zircon | 9.AD.30 | Zr(SiO4) |
| ⓘ | Sillimanite | 9.AF.05 | Al2(SiO4)O |
| ⓘ | Kyanite | 9.AF.15 | Al2(SiO4)O |
| ⓘ | Titanite | 9.AG.15 | CaTiO(SiO4) |
| ⓘ | Axinite-(Mg) (TL) | 9.BD.20 | Ca2MgAl2BSi4O15OH |
| ⓘ | Axinite-(Mn) | 9.BD.20 | Ca2Mn2+Al2BSi4O15(OH) |
| ⓘ | Mukhinite | 9.BG.05a | (CaCa)(AlAlV3+)O[Si2O7][SiO4](OH) |
| ⓘ | Allanite-(Ce) | 9.BG.05b | (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH) |
| ⓘ | Zoisite var. Tanzanite | 9.BG.10 | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| ⓘ | 9.BG.10 | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) | |
| ⓘ | Dravite | 9.CK.05 | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| ⓘ | Diopside var. Chromium-bearing Diopside | 9.DA.15 | Ca(Mg,Cr)Si2O6 |
| ⓘ | 9.DA.15 | CaMgSi2O6 | |
| ⓘ | Tremolite | 9.DE.10 | ◻Ca2Mg5(Si8O22)(OH)2 |
| ⓘ | var. Chrome-Tremolite | 9.DE.10 | ◻{Ca2}{Mg5}(Si8O22)(OH)2 |
| ⓘ | Pectolite | 9.DG.05 | NaCa2Si3O8(OH) |
| ⓘ | Prehnite | 9.DP.20 | Ca2Al2Si3O10(OH)2 |
| ⓘ | Muscovite var. Fuchsite | 9.EC.15 | K(Al,Cr)3Si3O10(OH)2 |
| ⓘ | 9.EC.15 | KAl2(AlSi3O10)(OH)2 | |
| ⓘ | Phlogopite | 9.EC.20 | KMg3(AlSi3O10)(OH)2 |
| ⓘ | var. Vanadium-bearing phlogopite | 9.EC.20 | K(Mg,V3+)3(AlSi3O10)(OH)2 |
| ⓘ | Clinochlore | 9.EC.55 | Mg5Al(AlSi3O10)(OH)8 |
| ⓘ | Mesolite | 9.GA.05 | Na2Ca2Si9Al6O30 · 8H2O |
| ⓘ | Scolecite | 9.GA.05 | CaAl2Si3O10 · 3H2O |
| ⓘ | Laumontite | 9.GB.10 | CaAl2Si4O12 · 4H2O |
| ⓘ | Heulandite-Ca | 9.GE.05 | (Ca,Na)5(Si27Al9)O72 · 26H2O |
| Unclassified | |||
| ⓘ | 'Apophyllite Group' | - | AB4[Si8O20]X · 8H2O |
| ⓘ | 'Chabazite' | - | |
| ⓘ | 'Heulandite Subgroup' | - | (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O |
| ⓘ | 'Stilbite Subgroup' | - | M6-7[Al8-9Si27-28O72] · nH2O |
| ⓘ | 'Tourmaline' | - | AD3G6(T6O18)(BO3)3X3Z |
| ⓘ | 'Scapolite' | - | |
| ⓘ | 'Apatite' | - | Ca5(PO4)3A |
| ⓘ | 'Wurtzite-4H' | - | ZnS |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Allanite-(Ce) | (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH) |
| H | ⓘ Apophyllite Group | AB4[Si8O20]X · 8H2O |
| H | ⓘ Clinochlore | Mg5Al(AlSi3O10)(OH)8 |
| H | ⓘ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| H | ⓘ Muscovite var. Fuchsite | K(Al,Cr)3Si3O10(OH)2 |
| H | ⓘ Gravegliaite | Mn2+SO3 · 3H2O |
| H | ⓘ Gypsum | CaSO4 · 2H2O |
| H | ⓘ Heulandite Subgroup | (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O |
| H | ⓘ Laumontite | CaAl2Si4O12 · 4H2O |
| H | ⓘ Axinite-(Mg) | Ca2MgAl2BSi4O15OH |
| H | ⓘ Axinite-(Mn) | Ca2Mn2+Al2BSi4O15(OH) |
| H | ⓘ Mesolite | Na2Ca2Si9Al6O30 · 8H2O |
| H | ⓘ Mukhinite | (CaCa)(AlAlV3+)O[Si2O7][SiO4](OH) |
| H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| H | ⓘ Pectolite | NaCa2Si3O8(OH) |
| H | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| H | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| H | ⓘ Scolecite | CaAl2Si3O10 · 3H2O |
| H | ⓘ Stilbite Subgroup | M6-7[Al8-9Si27-28O72] · nH2O |
| H | ⓘ Zoisite var. Tanzanite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| H | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
| H | ⓘ Zoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| H | ⓘ Heulandite-Ca | (Ca,Na)5(Si27Al9)O72 · 26H2O |
| H | ⓘ Tremolite var. Chrome-Tremolite | ◻{Ca2}{Mg5}(Si8O22)(OH)2 |
| H | ⓘ Phlogopite var. Vanadium-bearing phlogopite | K(Mg,V3+)3(AlSi3O10)(OH)2 |
| B | Boron | |
| B | ⓘ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| B | ⓘ Axinite-(Mg) | Ca2MgAl2BSi4O15OH |
| B | ⓘ Axinite-(Mn) | Ca2Mn2+Al2BSi4O15(OH) |
| B | ⓘ Tourmaline | AD3G6(T6O18)(BO3)3X3Z |
| C | Carbon | |
| C | ⓘ Calcite | CaCO3 |
| C | ⓘ Graphite | C |
| C | ⓘ Rhodochrosite | MnCO3 |
| C | ⓘ Siderite | FeCO3 |
| O | Oxygen | |
| O | ⓘ Allanite-(Ce) | (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH) |
| O | ⓘ Apophyllite Group | AB4[Si8O20]X · 8H2O |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Diopside var. Chromium-bearing Diopside | Ca(Mg,Cr)Si2O6 |
| O | ⓘ Clinochlore | Mg5Al(AlSi3O10)(OH)8 |
| O | ⓘ Diopside | CaMgSi2O6 |
| O | ⓘ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| O | ⓘ Fluorapatite | Ca5(PO4)3F |
| O | ⓘ Muscovite var. Fuchsite | K(Al,Cr)3Si3O10(OH)2 |
| O | ⓘ Gravegliaite | Mn2+SO3 · 3H2O |
| O | ⓘ Grossular | Ca3Al2(SiO4)3 |
| O | ⓘ Gypsum | CaSO4 · 2H2O |
| O | ⓘ Hematite | Fe2O3 |
| O | ⓘ Heulandite Subgroup | (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O |
| O | ⓘ Karelianite | V23+O3 |
| O | ⓘ Kyanite | Al2(SiO4)O |
| O | ⓘ Laumontite | CaAl2Si4O12 · 4H2O |
| O | ⓘ Axinite-(Mg) | Ca2MgAl2BSi4O15OH |
| O | ⓘ Axinite-(Mn) | Ca2Mn2+Al2BSi4O15(OH) |
| O | ⓘ Mesolite | Na2Ca2Si9Al6O30 · 8H2O |
| O | ⓘ Mukhinite | (CaCa)(AlAlV3+)O[Si2O7][SiO4](OH) |
| O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Pectolite | NaCa2Si3O8(OH) |
| O | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| O | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Rhodochrosite | MnCO3 |
| O | ⓘ Scolecite | CaAl2Si3O10 · 3H2O |
| O | ⓘ Siderite | FeCO3 |
| O | ⓘ Sillimanite | Al2(SiO4)O |
| O | ⓘ Stilbite Subgroup | M6-7[Al8-9Si27-28O72] · nH2O |
| O | ⓘ Zoisite var. Tanzanite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| O | ⓘ Titanite | CaTiO(SiO4) |
| O | ⓘ Tourmaline | AD3G6(T6O18)(BO3)3X3Z |
| O | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
| O | ⓘ Zircon | Zr(SiO4) |
| O | ⓘ Zoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| O | ⓘ Heulandite-Ca | (Ca,Na)5(Si27Al9)O72 · 26H2O |
| O | ⓘ Grossular var. Tsavorite | Ca3Al2(SiO4)3 |
| O | ⓘ Tremolite var. Chrome-Tremolite | ◻{Ca2}{Mg5}(Si8O22)(OH)2 |
| O | ⓘ Apatite | Ca5(PO4)3A |
| O | ⓘ Phlogopite var. Vanadium-bearing phlogopite | K(Mg,V3+)3(AlSi3O10)(OH)2 |
| F | Fluorine | |
| F | ⓘ Fluorapatite | Ca5(PO4)3F |
| F | ⓘ Fluorite | CaF2 |
| Na | Sodium | |
| Na | ⓘ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| Na | ⓘ Heulandite Subgroup | (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O |
| Na | ⓘ Mesolite | Na2Ca2Si9Al6O30 · 8H2O |
| Na | ⓘ Pectolite | NaCa2Si3O8(OH) |
| Na | ⓘ Heulandite-Ca | (Ca,Na)5(Si27Al9)O72 · 26H2O |
| Mg | Magnesium | |
| Mg | ⓘ Diopside var. Chromium-bearing Diopside | Ca(Mg,Cr)Si2O6 |
| Mg | ⓘ Clinochlore | Mg5Al(AlSi3O10)(OH)8 |
| Mg | ⓘ Diopside | CaMgSi2O6 |
| Mg | ⓘ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| Mg | ⓘ Axinite-(Mg) | Ca2MgAl2BSi4O15OH |
| Mg | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| Mg | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
| Mg | ⓘ Tremolite var. Chrome-Tremolite | ◻{Ca2}{Mg5}(Si8O22)(OH)2 |
| Mg | ⓘ Phlogopite var. Vanadium-bearing phlogopite | K(Mg,V3+)3(AlSi3O10)(OH)2 |
| Al | Aluminium | |
| Al | ⓘ Allanite-(Ce) | (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH) |
| Al | ⓘ Clinochlore | Mg5Al(AlSi3O10)(OH)8 |
| Al | ⓘ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| Al | ⓘ Muscovite var. Fuchsite | K(Al,Cr)3Si3O10(OH)2 |
| Al | ⓘ Grossular | Ca3Al2(SiO4)3 |
| Al | ⓘ Heulandite Subgroup | (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O |
| Al | ⓘ Kyanite | Al2(SiO4)O |
| Al | ⓘ Laumontite | CaAl2Si4O12 · 4H2O |
| Al | ⓘ Axinite-(Mg) | Ca2MgAl2BSi4O15OH |
| Al | ⓘ Axinite-(Mn) | Ca2Mn2+Al2BSi4O15(OH) |
| Al | ⓘ Mesolite | Na2Ca2Si9Al6O30 · 8H2O |
| Al | ⓘ Mukhinite | (CaCa)(AlAlV3+)O[Si2O7][SiO4](OH) |
| Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| Al | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| Al | ⓘ Scolecite | CaAl2Si3O10 · 3H2O |
| Al | ⓘ Sillimanite | Al2(SiO4)O |
| Al | ⓘ Stilbite Subgroup | M6-7[Al8-9Si27-28O72] · nH2O |
| Al | ⓘ Zoisite var. Tanzanite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| Al | ⓘ Zoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| Al | ⓘ Heulandite-Ca | (Ca,Na)5(Si27Al9)O72 · 26H2O |
| Al | ⓘ Grossular var. Tsavorite | Ca3Al2(SiO4)3 |
| Al | ⓘ Phlogopite var. Vanadium-bearing phlogopite | K(Mg,V3+)3(AlSi3O10)(OH)2 |
| Si | Silicon | |
| Si | ⓘ Allanite-(Ce) | (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH) |
| Si | ⓘ Apophyllite Group | AB4[Si8O20]X · 8H2O |
| Si | ⓘ Diopside var. Chromium-bearing Diopside | Ca(Mg,Cr)Si2O6 |
| Si | ⓘ Clinochlore | Mg5Al(AlSi3O10)(OH)8 |
| Si | ⓘ Diopside | CaMgSi2O6 |
| Si | ⓘ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| Si | ⓘ Muscovite var. Fuchsite | K(Al,Cr)3Si3O10(OH)2 |
| Si | ⓘ Grossular | Ca3Al2(SiO4)3 |
| Si | ⓘ Heulandite Subgroup | (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O |
| Si | ⓘ Kyanite | Al2(SiO4)O |
| Si | ⓘ Laumontite | CaAl2Si4O12 · 4H2O |
| Si | ⓘ Axinite-(Mg) | Ca2MgAl2BSi4O15OH |
| Si | ⓘ Axinite-(Mn) | Ca2Mn2+Al2BSi4O15(OH) |
| Si | ⓘ Mesolite | Na2Ca2Si9Al6O30 · 8H2O |
| Si | ⓘ Mukhinite | (CaCa)(AlAlV3+)O[Si2O7][SiO4](OH) |
| Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | ⓘ Pectolite | NaCa2Si3O8(OH) |
| Si | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| Si | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Scolecite | CaAl2Si3O10 · 3H2O |
| Si | ⓘ Sillimanite | Al2(SiO4)O |
| Si | ⓘ Stilbite Subgroup | M6-7[Al8-9Si27-28O72] · nH2O |
| Si | ⓘ Zoisite var. Tanzanite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| Si | ⓘ Titanite | CaTiO(SiO4) |
| Si | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
| Si | ⓘ Zircon | Zr(SiO4) |
| Si | ⓘ Zoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| Si | ⓘ Heulandite-Ca | (Ca,Na)5(Si27Al9)O72 · 26H2O |
| Si | ⓘ Grossular var. Tsavorite | Ca3Al2(SiO4)3 |
| Si | ⓘ Tremolite var. Chrome-Tremolite | ◻{Ca2}{Mg5}(Si8O22)(OH)2 |
| Si | ⓘ Phlogopite var. Vanadium-bearing phlogopite | K(Mg,V3+)3(AlSi3O10)(OH)2 |
| P | Phosphorus | |
| P | ⓘ Fluorapatite | Ca5(PO4)3F |
| P | ⓘ Apatite | Ca5(PO4)3A |
| S | Sulfur | |
| S | ⓘ Alabandite | MnS |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Colusite | Cu13VAs3S16 |
| S | ⓘ Germanocolusite | Cu26V2(Ge,As)6S32 |
| S | ⓘ Gravegliaite | Mn2+SO3 · 3H2O |
| S | ⓘ Gypsum | CaSO4 · 2H2O |
| S | ⓘ Millerite | NiS |
| S | ⓘ Molybdenite | MoS2 |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Pyrrhotite | Fe1-xS |
| S | ⓘ Sphalerite | ZnS |
| S | ⓘ Stannite | Cu2FeSnS4 |
| S | ⓘ Native Sulphur | S8 |
| S | ⓘ Wurtzite | (Zn,Fe)S |
| S | ⓘ Wurtzite-4H | ZnS |
| S | ⓘ Merelaniite | Mo4Pb4VSbS15 |
| S | ⓘ Richardsite | Zn2CuGaS4 |
| K | Potassium | |
| K | ⓘ Muscovite var. Fuchsite | K(Al,Cr)3Si3O10(OH)2 |
| K | ⓘ Heulandite Subgroup | (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O |
| K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| K | ⓘ Phlogopite | KMg3(AlSi3O10)(OH)2 |
| K | ⓘ Phlogopite var. Vanadium-bearing phlogopite | K(Mg,V3+)3(AlSi3O10)(OH)2 |
| Ca | Calcium | |
| Ca | ⓘ Allanite-(Ce) | (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH) |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Diopside var. Chromium-bearing Diopside | Ca(Mg,Cr)Si2O6 |
| Ca | ⓘ Diopside | CaMgSi2O6 |
| Ca | ⓘ Fluorapatite | Ca5(PO4)3F |
| Ca | ⓘ Fluorite | CaF2 |
| Ca | ⓘ Grossular | Ca3Al2(SiO4)3 |
| Ca | ⓘ Gypsum | CaSO4 · 2H2O |
| Ca | ⓘ Heulandite Subgroup | (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O |
| Ca | ⓘ Laumontite | CaAl2Si4O12 · 4H2O |
| Ca | ⓘ Axinite-(Mg) | Ca2MgAl2BSi4O15OH |
| Ca | ⓘ Axinite-(Mn) | Ca2Mn2+Al2BSi4O15(OH) |
| Ca | ⓘ Mesolite | Na2Ca2Si9Al6O30 · 8H2O |
| Ca | ⓘ Mukhinite | (CaCa)(AlAlV3+)O[Si2O7][SiO4](OH) |
| Ca | ⓘ Pectolite | NaCa2Si3O8(OH) |
| Ca | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| Ca | ⓘ Scolecite | CaAl2Si3O10 · 3H2O |
| Ca | ⓘ Zoisite var. Tanzanite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| Ca | ⓘ Titanite | CaTiO(SiO4) |
| Ca | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
| Ca | ⓘ Zoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| Ca | ⓘ Heulandite-Ca | (Ca,Na)5(Si27Al9)O72 · 26H2O |
| Ca | ⓘ Grossular var. Tsavorite | Ca3Al2(SiO4)3 |
| Ca | ⓘ Tremolite var. Chrome-Tremolite | ◻{Ca2}{Mg5}(Si8O22)(OH)2 |
| Ca | ⓘ Apatite | Ca5(PO4)3A |
| Ti | Titanium | |
| Ti | ⓘ Titanite | CaTiO(SiO4) |
| V | Vanadium | |
| V | ⓘ Colusite | Cu13VAs3S16 |
| V | ⓘ Germanocolusite | Cu26V2(Ge,As)6S32 |
| V | ⓘ Karelianite | V23+O3 |
| V | ⓘ Mukhinite | (CaCa)(AlAlV3+)O[Si2O7][SiO4](OH) |
| V | ⓘ Merelaniite | Mo4Pb4VSbS15 |
| V | ⓘ Phlogopite var. Vanadium-bearing phlogopite | K(Mg,V3+)3(AlSi3O10)(OH)2 |
| Cr | Chromium | |
| Cr | ⓘ Diopside var. Chromium-bearing Diopside | Ca(Mg,Cr)Si2O6 |
| Cr | ⓘ Muscovite var. Fuchsite | K(Al,Cr)3Si3O10(OH)2 |
| Mn | Manganese | |
| Mn | ⓘ Alabandite | MnS |
| Mn | ⓘ Gravegliaite | Mn2+SO3 · 3H2O |
| Mn | ⓘ Axinite-(Mn) | Ca2Mn2+Al2BSi4O15(OH) |
| Mn | ⓘ Rhodochrosite | MnCO3 |
| Fe | Iron | |
| Fe | ⓘ Allanite-(Ce) | (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH) |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Hematite | Fe2O3 |
| Fe | ⓘ Pyrite | FeS2 |
| Fe | ⓘ Pyrrhotite | Fe1-xS |
| Fe | ⓘ Siderite | FeCO3 |
| Fe | ⓘ Stannite | Cu2FeSnS4 |
| Fe | ⓘ Wurtzite | (Zn,Fe)S |
| Ni | Nickel | |
| Ni | ⓘ Millerite | NiS |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Cu | ⓘ Colusite | Cu13VAs3S16 |
| Cu | ⓘ Germanocolusite | Cu26V2(Ge,As)6S32 |
| Cu | ⓘ Stannite | Cu2FeSnS4 |
| Cu | ⓘ Richardsite | Zn2CuGaS4 |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| Zn | ⓘ Wurtzite | (Zn,Fe)S |
| Zn | ⓘ Wurtzite-4H | ZnS |
| Zn | ⓘ Richardsite | Zn2CuGaS4 |
| Ga | Gallium | |
| Ga | ⓘ Richardsite | Zn2CuGaS4 |
| Ge | Germanium | |
| Ge | ⓘ Germanocolusite | Cu26V2(Ge,As)6S32 |
| As | Arsenic | |
| As | ⓘ Colusite | Cu13VAs3S16 |
| As | ⓘ Germanocolusite | Cu26V2(Ge,As)6S32 |
| Se | Selenium | |
| Se | ⓘ Clausthalite | PbSe |
| Zr | Zirconium | |
| Zr | ⓘ Zircon | Zr(SiO4) |
| Mo | Molybdenum | |
| Mo | ⓘ Molybdenite | MoS2 |
| Mo | ⓘ Merelaniite | Mo4Pb4VSbS15 |
| Sn | Tin | |
| Sn | ⓘ Stannite | Cu2FeSnS4 |
| Sb | Antimony | |
| Sb | ⓘ Merelaniite | Mo4Pb4VSbS15 |
| Ce | Cerium | |
| Ce | ⓘ Allanite-(Ce) | (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH) |
| Pb | Lead | |
| Pb | ⓘ Clausthalite | PbSe |
| Pb | ⓘ Merelaniite | Mo4Pb4VSbS15 |
Other Databases
| Wikipedia: | https://ceb.wikipedia.org/wiki/Merelani |
|---|---|
| Wikidata ID: | Q35728053 |
Localities in this Region
- Manyara Region
- Simanjiro District
- Lelatema Mountains
- Simanjiro District
Other Regions, Features and Areas containing this locality
AfricaContinent
- East African Rift System (EARS)Zone (Tectonic)
African Plate
- Tanzanian Eastern GranulitesOrogenic Belt
Somali PlateTectonic Plate
This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders
for access and that you are aware of all safety precautions necessary.
References
Fritz, Eric A.; Laurs, Brendan M.; Downs, Robert T.; Costin, Gelu (2007) Yellowish Green Diopside and Tremolite from Merelani, Tanzania. Gems & Gemology, 43 (2). 146-148 doi:10.5741/gems.43.2.146
Giuliani, G., Ohnenstetter, D., Palhol, F., Feneyrol, J., Boutroy, E., De Boissezon, H., Lhomme, T. (2008) Karelianite and vanadian phlogopite from the Merelani Hills gem zoisite deposits, Tanzania. The Canadian Mineralogist, 46 (5) 1183-1194 doi:10.3749/canmin.46.5.1183
Pohwat, Paul W. (2013) Connoisseur's Choice: Diopside, Merelani, Arusha Region, Tanzania. Rocks & Minerals, 88 (2). 166-173 doi:10.1080/00357529.2013.763697
Jaszczak, John A., Trinchillo, Daniel (2013) Miracle at Merelani A Remarkable Occurrence of Graphite, Diopside, and Associated Minerals from the Karo Mine, Block D, Merelani Hills, Arusha Region, Tanzania. Rocks & Minerals, 88 (2) 154-165 doi:10.1080/00357529.2013.763671
Americolo, Fabio (2013) Merelani (Mererani): A Pictorial of An Incredible Place. Rocks & Minerals, 88 (2) 174-177 doi:10.1080/00357529.2013.763673
Long, Jena M., Rakovan, John, Jaszczak, John A., Sommer, Andre J., Anczkiewicz, Robert (2013) Fluorapatite From A Remarkable Occurrence of Graphite And Associated Minerals. Rocks & Minerals, 88 (2) 178-183 doi:10.1080/00357529.2013.763690
HARRIS, C., HLONGWANE, W., GULE, N., SCHEEPERS, R. (2014) Origin of tanzanite and associated gemstone mineralization at Merelani, Tanzania. South African Journal of Geology, 117 (1). 15-30 doi:10.2113/gssajg.117.1.15
Jaszczak, John, Rumsey, Michael, Bindi, Luca, Hackney, Stephen, Wise, Michael, Stanley, Chris, Spratt, John (2016) Merelaniite, Mo4Pb4VSbS15, a New Molybdenum-Essential Member of the Cylindrite Group, from the Merelani Tanzanite Deposit, Lelatema Mountains, Manyara Region, Tanzania. Minerals, 6 (4). 115 doi:10.3390/min6040115
Jaszczak, John A. (2017) The Where of Mineral Names: Merelaniite, Merelani (Mererani), Manyara Region, Tanzania. Rocks & Minerals, 92 (4) 382-385 doi:10.1080/00357529.2017.1308798
Pohl, Walter Leopold (2019) The tsavorite (gem quality green vanadium grossular) minerogenetic system in East Africa: a case of metamorphic partial melting and lateral secretion. Arabian Journal of Geosciences, 12 (19). 612 doi:10.1007/s12517-019-4744-y
Cairncross, Bruce (2020) Connoisseur’s Choice: Tsavorite, The Green Gem Variety of Grossular, Merelani Hills, Manyara District, Tanzania. Rocks & Minerals, 95 (3). 252-259 doi:10.1080/00357529.2020.1716171
Bindi, Luca, Jaszczak, John A. (2020) Richardsite, Zn2CuGaS4, A New Gallium-Essential Member of the Stannite Group from the Gem Mines near Merelani, Tanzania. Minerals, 10 (5) 467 doi:10.3390/min10050467
Idini, Alfredo, Angeli, Celestino, Frau, Franco, Ennas, Guido, Naitza, Stefano, De Giudici, Giovanni Battista, Argazzi, Roberto (2023) Mineralogical characterization of fluorescent grossular garnet var. tsavorite from Merelani Hills, Tanzania. Physics and Chemistry of Minerals, 50 (1) doi:10.1007/s00269-023-01233-w
Quick NavTopCommoditiesMineral ListRock TypesOther DatabasesLocalities in RegionOther RegionsReferences
Merelani Hills, Lelatema Mountains, Simanjiro District, Manyara Region, Tanzania