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Fluorite from
Thomaston Dam railroad cut, Thomaston Dam, Thomaston, Litchfield County, Connecticut, USA
| Locality type: | Road Cutting | |
| Classification | ||
|---|---|---|
| Species: | Fluorite | |
| Formula: | CaF2 | |
| Formation: | Primary | |
| Comments: | Very common in hydrothermal fault veins as coarse crystalline masses, found with most minerals present in these veins: quartz, calcite, galena, sphalerite, pyrite, zeolites, with open spaces lined by tightly packed, rough-surfaced (from many small sub-faces) crystals. Crystals to 7 cm were removed intact during the initial blasting of the railroad cut. As well-formed euhedral isolated crystals in voids with other minerals usually up to 2 cm. | |
| Habit: | cubic, sometimes modified by dodecahedron and tetrahexahedron | |
| Colour: | purple and green shades to colorless, usually in layers | |
| Luminescent properties: | blue-white to purplish blue under SW UV, often zoned with the daylight color. | |
| Quality for species: | Good crystals or rich for species - important (!) | |
| Abundance at site: | Very common | |
| Confirmation | ||
| Validity: | Confirmed | |
| Confirmation Methods: | Visually Identified | |
| Associated Minerals Based on Photo Data: | ||
| Quartz | 38 | |
| Calcite | 25 | |
| Heulandite-Ca | 18 | |
| Pyrite | 15 | |
| Galena | 15 | |
| Sphalerite | 9 | |
| Hemimorphite | 8 | |
| Stilbite Subgroup | 6 | |
| Hydrozincite | 4 | |
| Harmotome | 3 | |
| Stellerite | 2 | |
| Laumontite | 1 | |
| Stilbite-Ca | 1 | |
| Data | ||
| Mineral Data: | Click here to view Fluorite data | |
| Locality Data: | Click here to view Thomaston Dam railroad cut, Thomaston Dam, Thomaston, Litchfield County, Connecticut, USA | |
| Photo Gallery | View Gallery (30 photos) | |
| Data Identifiers | ||
| Mindat Occurrence Record ID: | 37395 | |
| Long-form Identifier: | 1:3:37395:1 | |
| GUID (UUID V4): | 0 | |
| Nearest other occurrences of Fluorite | ||
| 5.0km (3.1 miles) | ⓘReynolds Bridge, Thomaston, Litchfield County, Connecticut, USA | |
| 12.8km (8.0 miles) | ⓘRoute 73 quarry, Waterbury, New Haven County, Connecticut, USA | |
| 20.3km (12.6 miles) | ⓘTurkey Hill, Prospect, New Haven County, Connecticut, USA | |
| 23.2km (14.4 miles) | ⓘO and G quarry # 3, Prospect, New Haven County, Connecticut, USA | |
| 25.5km (15.9 miles) | ⓘHaynes Materials Quarry, Naugatuck, New Haven County, Connecticut, USA | |
| 26.5km (16.4 miles) | ⓘRockside Quarry, Mine Hill, Roxbury, Litchfield County, Connecticut, USA | |
| 28.6km (17.8 miles) | ⓘJinny Hill Mine (Cheshire Barite Mine), Cheshire, New Haven County, Connecticut, USA | |
| 28.7km (17.8 miles) | ⓘQuartz locality, Meriden, New Haven County, Connecticut, USA | |
| 28.7km (17.8 miles) | ⓘState Routes 9 and 372 interchange, Berlin, Hartford County, Connecticut, USA | |
| 34.2km (21.3 miles) | ⓘState Route 189 road cut, Tariffville Gorge, Bloomfield, Hartford County, Connecticut, USA | |
| References | ||
Thomaston Dam railroad cut, Thomaston Dam, Thomaston, Litchfield County, Connecticut, USA