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Dumortierite from
North Street mall, Danbury, Fairfield County, Connecticut, USA
| Locality type: | Construction Site | |
| Classification | ||
|---|---|---|
| Species: | Dumortierite | |
| Formula: | Al(Al2O)(Al2O)2(SiO4)3(BO3) | |
| Comments: | A few concentrations of tiny acicular crystals in one specimen of coarse-grained albite/quartz/biotite gneiss matrix. | |
| Habit: | acicular | |
| Colour: | bright blue | |
| Quality for species: | Poor for species, only of interest for locality collectors. (#) | |
| Abundance at site: | Extremely Rare | |
| Confirmation | ||
| Validity: | Unconfirmed/Questioned | |
| Associated Minerals Based on Photo Data: | ||
| Quartz | 3 | |
| Data | ||
| Mineral Data: | Click here to view Dumortierite data | |
| Locality Data: | Click here to view North Street mall, Danbury, Fairfield County, Connecticut, USA | |
| Data Identifiers | ||
| Mindat Occurrence Record ID: | 952466 | |
| Long-form Identifier: | 1:3:952466:8 | |
| GUID (UUID V4): | 0 | |
| Nearest other occurrences of Dumortierite | ||
| 45.3km (28.1 miles) | ⓘValhalla, Mount Pleasant, Westchester County, New York, USA | |
| 75.1km (46.6 miles) | ⓘ171st Street & Broadway, Manhattan (New York County), New York City, New York, USA | |
| 75.1km (46.6 miles) | ⓘFort Washington Avenue & 171st Street, Washington Heights, Manhattan (New York County), New York City, New York, USA | |
| References | ||
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Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2025, except where stated. Most political location boundaries are© OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 byJolyon Ralph.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844.doi:10.2138/am-2024-9486.
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Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2025, except where stated. Most political location boundaries are© OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 byJolyon Ralph.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844.doi:10.2138/am-2024-9486.
Privacy Policy -Terms & Conditions -Contact Us / DMCA issues -Report a bug/vulnerabilityCurrent server date and time: November 29, 2025 01:53:00