Classification |
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Species: | Sillimanite |
Formula: | Al2(SiO4)O |
Comments: | Prismatic crystals up to several inches long with rounded edges, some terminated. Probably found in a slab of loose gneiss. |
Habit: | prismatic crystals with rhombic cross-sections |
Colour: | clove-brown to gray |
Quality for species: | Good crystals or rich for species - important (!) |
Abundance at site: | Very common |
Confirmation |
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Validity: | Confirmed |
Confirmation Methods: | Wet Chemical |
Data |
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Mineral Data: | Click here to view Sillimanite data |
Locality Data: | Click here to view Sillimanite type locality, Chester, Middlesex County, Connecticut, USA |
Photo Gallery | View Gallery (3 photos) |
Data Identifiers |
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Mindat Occurrence Record ID: | 765671 |
Long-form Identifier: | 1:3:765671:2 |
GUID (UUID V4): | c97c5979-b3a8-42c9-9ded-57a988d9a653 |
Nearest other occurrences of Sillimanite |
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7.6km (4.7 miles) | ⓘState Route 9 rock cuts, Haddam, Middlesex County, Connecticut, USA |
9.0km (5.6 miles) | ⓘArnold Granite Quarry (General Brainerd Quarry; Great Hill Quarry; Hazelton Quarry; Haddam Quarry; Brookes Quarry), Haddam, Middlesex County, Connecticut, USA |
9.3km (5.7 miles) | ⓘAlmandine schorl and sillimanite locality, Haddam, Middlesex County, Connecticut, USA |
9.7km (6.0 miles) | ⓘConnecticut Yankee atomic power plant, Haddam Neck, Haddam, Middlesex County, Connecticut, USA |
11.2km (7.0 miles) | ⓘGillette Quarry (J-J Mine; Haddam Neck Quarry), Haddam Neck, Haddam, Middlesex County, Connecticut, USA |
14.0km (8.7 miles) | ⓘAnderson No. 1 Mica Mine (Swanson Mine; Swanson Lithia Mine; Old Lithia Mine; Chatham Lithia Mine), East Hampton (Chatham), Middlesex County, Connecticut, USA |
16.8km (10.4 miles) | ⓘWestchester, Colchester, New London County, Connecticut, USA |
19.5km (12.1 miles) | ⓘLinkpot cut, Airline Railroad, East Hampton (Chatham), Middlesex County, Connecticut, USA |
21.2km (13.2 miles) | ⓘGreat Hill cobalt mines, Cobalt, East Hampton (Chatham), Middlesex County, Connecticut, USA |
22.5km (14.0 miles) | ⓘHungry Hill, Guilford, New Haven County, Connecticut, USA |
References |
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Reference Search (possible matching items) |
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| | Book (edition) | (Brazil). Malcolm Back (Canada), Henry L. Barwood (USA). Dmitriy Belakovskiy (Russia). Fabio Bellatreccia...(Italy), T.S. Ercit (Canada). Alexander Falster (USA). Jeffrey de Fourestier (Canada). Robert Gault (Canada)...Henderson. Jr. (USA). D.D. Hogarth (Canada). J.L. Jam bor (Canada), Anthony R. Kampf (USA). Pave! M. Kartashov...Karnp-Moller (Denmark). Akira Kato (Japan). Lance E. Keams (USA). Elisabeth Kirchner (Austria), Uwe Kolitsch (Austria)...Republic). Per Nystcn (Sweden), David O'Hanlcy (USA). Filippo Olmi (deccased) (ltaly). Werner H. Paar |
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Sillimanite type locality, Chester, Middlesex County, Connecticut, USA