| Locality type: | Quarry |
| Classification |
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| Species: | Eucryptite |
| Formula: | LiAlSiO4 |
| Comments: | oriented intergrowth with very fine-grained, elongated albite. Grains are oriented perpendicular to the spodumene c axis and give an indistinct fibrous to columnar structure, this being always at right angles to the adjoining surface of the original mineral. Fractured surface typically has a frosty appearance. |
| Habit: | pseudomorphous after spodumene |
| Colour: | white to slightly greenish-white or pale gray |
| Luminescent properties: | red |
| Quality for species: | Good crystals or rich for species - important (!) |
| Abundance at site: | Common |
| Confirmation |
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| Validity: | Valid - Type Locality |
| Associated Minerals Based on Photo Data: |
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| Spodumene | ⓘ10 photos of Eucryptite associated with Spodumene at this locality. |
| Albite | ⓘ2 photos of Eucryptite associated with Albite at this locality. |
| Kunzite | ⓘ2 photos of Eucryptite associated with Kunzite at this locality. |
| Cymatolite | ⓘ2 photos of Eucryptite associated with Cymatolite at this locality. |
| Cleavelandite | ⓘ2 photos of Eucryptite associated with Cleavelandite at this locality. |
| Quartz | ⓘ1 photo of Eucryptite associated with Quartz at this locality. |
| Smoky Quartz | ⓘ1 photo of Eucryptite associated with Smoky Quartz at this locality. |
| Data |
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| Mineral Data: | Click here to view Eucryptite data |
| Locality Data: | Click here to view Fillow Quarry (Branchville Quarry; Branchville Mica Mine; Smith Mine), Branchville, Redding (Reading), Fairfield County, Connecticut, USA |
| Photo Gallery | View Gallery (13 photos) |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 38319 |
| Long-form Identifier: | 1:3:38319:8 |
| GUID (UUID V4): | 503f7db9-19a5-43c9-8921-18f2fce05628 |
| Nearest other occurrences of Eucryptite |
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| 79.3km (49.3 miles) | ⓘStrickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA |
| References |
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Fillow Quarry, Branchville, Redding, Fairfield County, Connecticut, USA