Labradorite

For your gem needs see our Recommended Suppliers.

CHEMISTRY Variable composition of NaAlSi₃O₈ and CaAl₂Si₂O₈
CRYSTALLOGRAPHY Monoclinic
REFRACTIVE INDEX 1.560 - 1.572
HARDNESS 6 - 6.5
SPECIFIC GRAVITY 2.69 - 2.72
CLEAVAGE Perfect two directions.
HEAT SENSITIVE No

WEARABILITY* Poor
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."

Back to the Index of Gemstones