CHEMISTRY CaCO3 (aragonite, the outer layer) about 82 - 86%, conchiolin 10 - 14%, water 2%. CRYSTALLOGRAPHY Aragonite is orthorhombic, with crystals radially oriented.REFRACTIVE INDEX 1.53 - 1.69HARDNESS 2.5 - 4.5SPECIFIC GRAVITY 2.6 - 2.78.CLEAVAGE NoneHEAT SENSITIVE Yes
WEARABILITY* GoodSPECIAL CARE INSTRUCTIONS Avoid heat and all chemicals, including perfume and other cosmetics.
ENHANCEMENTS Dying, common
*Wearability is graded as Excellent, Very Good, Good, Poor, and Forget It!For more details see the article on "Hardness and Wearability."
Your source of loose Precious & Semi Precious Gemstones Gem quality Gemstones at sale priceA lot of information to learn about Gemstones