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Ijaka, Kongwa, Kongwa District, Dodoma Region, Tanzania i
Regional Level Types
Ijaka Village
Kongwa Ward
Kongwa District District
Dodoma Region Region
Tanzania Country

Regional Level Types
Ijaka	Village
Kongwa	Ward
Kongwa District	District
Dodoma Region	Region
Tanzania	Country

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Predictive Mineralogy

Ruby, etc.

Ijaka, Kongwa, Kongwa District, Dodoma Region, Tanzania

Ruby, etc.

Ijaka, Kongwa, Kongwa District, Dodoma Region, Tanzania

Ruby, etc.

Ijaka, Kongwa, Kongwa District, Dodoma Region, Tanzania

Latitude & Longitude (WGS84):

6° 14' 53'' South , 36° 35' 5'' East

Latitude & Longitude (decimal):

Type:

Köppen climate type:

Aw : Tropical savanna, wet

Mindat Locality ID:

466052

Long-form identifier:

mindat:1:2:466052:4

GUID (UUID V4):

Small village near the villages Sagara A and Sagara B.

Prismatic ruby crystals in matrix with the locality label "Ijaka" were sold in autumn 2025 by Dr. Matthias Reich, www.minemineralmarket.com.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

5 valid minerals.

Detailed Mineral List:

ⓘ Actinolite

Formula: ◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂

References:

Lionel Robertson CollectionIdentified by Lionel Robertson: Visual Identification, Dealer/Collection Label

ⓘ Corundum

Formula: Al₂O₃

References:

Natural History Museum Vienna collection (prismatic ruby crystals in matrix with the locality label "Ijaka" were sold in autumn 2025 by Dr. Matthias Reich, www.minemineralmarket.com)Identification: Dealer/Collection Label

ⓘ Corundum var. Ruby

Formula: Al₂O₃

References:

ⓘ 'Feldspar Group'

References:

Natural History Museum Vienna collection (cat. no. O 3994; accompanying ruby)Identified by Uwe Kolitsch: Visual Identification

ⓘ Magnetite

Formula: Fe²⁺Fe³⁺₂O₄

References:

Lionel Robertson CollectionIdentified by Lionel Robertson: Visual Identification, Dealer/Collection Label

ⓘ Phlogopite

Formula: KMg₃(AlSi₃O₁₀)(OH)₂

References:

Natural History Museum Vienna collection (cat. no. O 3994; accompanying ruby)Identified by Uwe Kolitsch: Visual Identification

ⓘ Rutile

Formula: TiO₂

References:

Natural History Museum Vienna collection (cat. no. O 3994; accompanying ruby)Identified by Uwe Kolitsch: Visual Identification

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘ	Magnetite	4.BB.05	Fe²⁺Fe³⁺₂O₄
ⓘ	Corundum	4.CB.05	Al₂O₃
ⓘ	var. Ruby	4.CB.05	Al₂O₃
ⓘ	Rutile	4.DB.05	TiO₂
Group 9 - Silicates
ⓘ	Actinolite	9.DE.10	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
ⓘ	Phlogopite	9.EC.20	KMg₃(AlSi₃O₁₀)(OH)₂
Unclassified
ⓘ	'Feldspar Group'	-

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
H	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
O	Oxygen
O	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
O	ⓘ Corundum	Al₂O₃
O	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
O	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
O	ⓘ Corundum var. Ruby	Al₂O₃
O	ⓘ Rutile	TiO₂
Mg	Magnesium
Mg	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Mg	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
Al	Aluminium
Al	ⓘ Corundum	Al₂O₃
Al	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
Al	ⓘ Corundum var. Ruby	Al₂O₃
Si	Silicon
Si	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Si	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
K	Potassium
K	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
Ca	Calcium
Ca	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Ti	Titanium
Ti	ⓘ Rutile	TiO₂
Fe	Iron
Fe	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Fe	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄

Other Regions, Features and Areas containing this locality

AfricaContinent

East African Rift System (EARS)Zone (Tectonic)

African Plate

Congo Craton
- Tanzania CratonCraton

Somali PlateTectonic Plate

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Ijaka, Kongwa, Kongwa District, Dodoma Region, Tanzania i
Regional Level Types
Ijaka Village
Kongwa Ward
Kongwa District District
Dodoma Region Region
Tanzania Country

Help document this locality

Help document this locality

Select Mineral List Type

Mineral List

Detailed Mineral List:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

List of minerals for each chemical element

Other Regions, Features and Areas containing this locality

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Help document this locality

Help document this locality

Select Mineral List Type

Mineral List

Detailed Mineral List:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

List of minerals for each chemical element

Other Regions, Features and Areas containing this locality

Ijaka, Kongwa, Kongwa District, Dodoma Region, Tanzania i
Regional Level Types
Ijaka Village
Kongwa Ward
Kongwa District District
Dodoma Region Region
Tanzania Country