Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-2.642.40-2.42
1
7.18
👆🏻
Fracture
Uneven, Splintery, Conchoidal
-
Cleavage
Absent
{010} Perfect, {001} Distinct
Mohs Hardness
6.5-74.5
2
10
👆🏻
Chemical Composition
SiO 2Arthur Thomas , Gemstones (2009)
Ca 2B 6O 11 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references