| Locality type: | Quarry |
| Classification |
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| Species: | Muscovite |
| Formula: | KAl2(AlSi3O10)(OH)2 |
| Comments: | A major accessory of the pegmatite in general, in books up to 45 cm in diameter and 20 cm thick. Books often contain beautiful inclusions of green elbaite and black schorl, as well as hexagonal hematite platelets and flattened magnetite octahedra. Some muscovite crystals are surrounded by overgrowths of lepidolite and schernikite that cleave as a single unit. |
| Habit: | pseudo-hexagonal tabular |
| Colour: | silvery-white to greenish |
| Quality for species: | Good crystals or rich for species - important (!) |
| Abundance at site: | Very common |
| Confirmation |
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| Validity: | Confirmed |
| Confirmation Methods: | Visually Identified |
| Associated Minerals Based on Photo Data: |
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| Albite | β19 photos of Muscovite associated with Albite at this locality. |
| Quartz | β12 photos of Muscovite associated with Quartz at this locality. |
| Elbaite | β12 photos of Muscovite associated with Elbaite at this locality. |
| Beryl | β10 photos of Muscovite associated with Beryl at this locality. |
| Lepidolite | β10 photos of Muscovite associated with Lepidolite at this locality. |
| Schernikite | β9 photos of Muscovite associated with Schernikite at this locality. |
| Fluorapatite | β9 photos of Muscovite associated with Fluorapatite at this locality. |
| Smoky Quartz | β8 photos of Muscovite associated with Smoky Quartz at this locality. |
| Chlorophane | β4 photos of Muscovite associated with Chlorophane at this locality. |
| Topaz | β3 photos of Muscovite associated with Topaz at this locality. |
| Data |
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| Mineral Data: | Click here to view Muscovite data |
| Locality Data: | Click here to view Gillette Quarry (J-J Mine; Haddam Neck Quarry), Haddam Neck, Haddam, Middlesex County, Connecticut, USA |
| Photo Gallery | View Gallery (8 photos) |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 36946 |
| Long-form Identifier: | 1:3:36946:2 |
| GUID (UUID V4): | 6063bb9f-3f05-4721-82ed-577764daa202 |
| Nearest other occurrences of Muscovite |
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| 0.6km (0.4 miles) | βQuarry Hill (Brainerd Quarries; Shailor Quarries), Haddam Neck, Haddam, Middlesex County, Connecticut, USA |
| 1.3km (0.8 miles) | βTidewater feldspar quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA |
| 1.5km (0.9 miles) | βKnudsen prospects, Haddam Neck, Haddam, Middlesex County, Connecticut, USA |
| 1.5km (1.0 miles) | βConnecticut Yankee atomic power plant, Haddam Neck, Haddam, Middlesex County, Connecticut, USA |
| 1.6km (1.0 miles) | βFeldspar quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA |
| 1.9km (1.2 miles) | βKelsey prospect (Parmalee farm), Haddam, Middlesex County, Connecticut, USA |
| 2.0km (1.2 miles) | βRock Landing Quarry (Capt. Rohrback Quarry), Haddam Neck, Haddam, Middlesex County, Connecticut, USA |
| 2.3km (1.4 miles) | βArnold Granite Quarry (General Brainerd Quarry; Great Hill Quarry; Hazelton Quarry; Haddam Quarry; Brookes Quarry), Haddam, Middlesex County, Connecticut, USA |
| 2.4km (1.5 miles) | βJail Hill Road locality (Jail Hill Quarry), Haddam, Middlesex County, Connecticut, USA |
| 2.5km (1.6 miles) | βForest Ridge Road, Higganum, Haddam, Middlesex County, Connecticut, USA |
| References |
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Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA