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Name: |
danburite |
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Class: |
Silicates |
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Chemistry: |
CaB2Si2O8 calcium borosilicate |
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Color(s): |
clear, white, brown, greenish, occasionally pale yellow |
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Hardness: |
7 - 7.3 |
SpecGrav: |
2.97 - 3.02 |
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Fracture: |
conchoidal |
Cleavage: |
poor |
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Crystal: |
Orthorhombic large crystals common, prismatic with good termination |
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Envronment: |
found in fissures, in Alpine crevices, contact metamorphic dolomites, and hydrothermal sulfide veins. |
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Association: |
feldspar, calcite, dolomite, quartz, datolite, prehnite, pyrite |
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Locals: |
| Conn., New York, USA | Mexico | Bolivia | USSR | Japan | Germany | Switzerland | |
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Misc: |
Named for an original source location in Danbury Connecticut. It shows a green color in a flame test (boron), it is not particularly soluble in acids. |
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Photos |
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1.) Characas, San Luis Potosi, Mexico |
3.) Characas, San Luis Potosi, Mexico |
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