Axenite

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CHEMISTRY (Ca, Mn, Fe, Mg)₃Al₂BSi₄O₁₅(OH)
CRYSTALLOGRAPHY Triclinic
REFRACTIVE INDEX 1.674 - 1.704
HARDNESS 6.5 - 7, variable with direction
SPECIFIC GRAVITY 6.5 - 7
CLEAVAGE Good 1 direction
HEAT SENSITIVE Slight

WEARABILITY* Very Good
SPECIAL CARE INSTRUCTIONS Avoid rough handling

ENHANCEMENTS None

*Wearability is graded as Excellent, Very Good, Good, Poor, and Forget It!
For more details see the article on "Hardness and Wearability."

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