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Name: |
apophyllite |
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Class: |
Silicates |
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Chemistry: |
KCa4(Si4O10)(F)*8 H2O hydrous calcium potassium (fluoro) silicate |
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Color(s): |
pale green, white, gray, reddish, clear, Streak: white |
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Hardness: |
4.5 - 5.0 |
SpecGrav: |
2.3 - 2.4 |
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Fracture: |
uneven |
Cleavage: |
perfect one direction |
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Crystal: |
tetragonal (often dipyramidal) may look cubic if non terminated |
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Envronment: |
cavities in basaltic rocks |
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Association: |
zeolites, prehnite, stilbite, analcite, scolecite |
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Locals: |
| Poona/India | New Jersey, Michigan/USA | Mexico | |
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Misc: |
from the Greek "apo" and "phyllon", meaning "off" - "leaf", because it flakes apart when heated in flame. |
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Photos |
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1.) Poona, India |
3.) Poona, India |
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