| Locality type: | Quarry |
| Classification |
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| Species: | 'Microlite Group' (not an IMA approved species) |
| Formula: | A2-mTa2X6-wZ-n |
| Formation: | Primary |
| Comments: | Typically as micro-crystals but can reach 8mm, most easily found in the aplitic zone, but in the intermediate zone and core margin also. Four specimens have been analyzed via SEM-EDS and proved to be calciomicrolite with little to no Na or Nb. |
| Habit: | octahedron modified by dodecahedron, hexahedron and trapezohedron |
| Colour: | dark yellow-green, brown, black |
| Quality for species: | Good crystals or rich for species - important (!) |
| Abundance at site: | Common |
| Confirmation |
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| Validity: | Believed Valid |
| Associated Minerals Based on Photo Data: |
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| Fluorapatite | ⓘ2 photos of Microlite Group associated with Fluorapatite at this locality. |
| Elbaite | ⓘ2 photos of Microlite Group associated with Elbaite at this locality. |
| Albite | ⓘ2 photos of Microlite Group associated with Albite at this locality. |
| Beryl | ⓘ1 photo of Microlite Group associated with Beryl at this locality. |
| Chlorophane | ⓘ1 photo of Microlite Group associated with Chlorophane at this locality. |
| Lepidolite | ⓘ1 photo of Microlite Group associated with Lepidolite at this locality. |
| Metatorbernite | ⓘ1 photo of Microlite Group associated with Metatorbernite at this locality. |
| Microcline | ⓘ1 photo of Microlite Group associated with Microcline at this locality. |
| Muscovite | ⓘ1 photo of Microlite Group associated with Muscovite at this locality. |
| Data |
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| Mineral Data: | Click here to view Microlite Group data |
| Locality Data: | Click here to view Hewitt Gem Quarry (Herb's Gem Quarry; Sawmill Quarry), Haddam, Middlesex County, Connecticut, USA |
| Photo Gallery | View Gallery (11 photos) |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 131150 |
| Long-form Identifier: | 1:3:131150:1 |
| GUID (UUID V4): | 9085e272-8845-4a40-98a5-4e08ff7e981c |
| Nearest other occurrences of Microlite Group |
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| 0.5km (0.3 miles) | ⓘLong Hill prospects (Turkey Hill prospects), Haddam, Middlesex County, Connecticut, USA |
| 3.5km (2.2 miles) | ⓘChrysoberyl locality, Haddam, Middlesex County, Connecticut, USA |
| 4.4km (2.7 miles) | ⓘGillette Quarry (J-J Mine; Haddam Neck Quarry), Haddam Neck, Haddam, Middlesex County, Connecticut, USA |
| 7.1km (4.4 miles) | ⓘAnderson No. 1 Mica Mine (Swanson Mine; Swanson Lithia Mine; Old Lithia Mine; Chatham Lithia Mine), East Hampton (Chatham), Middlesex County, Connecticut, USA |
| 9.4km (5.9 miles) | ⓘSlocum prospect, East Hampton (Chatham), Middlesex County, Connecticut, USA |
| 12.7km (7.9 miles) | ⓘBecker Quarry, East Hampton (Chatham), Middlesex County, Connecticut, USA |
| 13.5km (8.4 miles) | ⓘWhite Rocks Quarry (Consolidated Quarry), White Rock Mining District, Middletown, Middlesex County, Connecticut, USA |
| 14.0km (8.7 miles) | ⓘRiverside Quarry (Western Quarry), White Rock Mining District, Middletown, Middlesex County, Connecticut, USA |
| 16.1km (10.0 miles) | ⓘHale-Walker prospects, Collins Hill, Portland, Middlesex County, Connecticut, USA |
| 16.9km (10.5 miles) | ⓘStrickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA |
| References |
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Hewitt Gem Quarry, Haddam, Middlesex County, Connecticut, USA