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Crocoite
Crocoite
☒

Sillimanite
Sillimanite
☒



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Crocoite
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Sillimanite
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
5.90-6.10
Conchoidal
{110} Distinct, {001} Indistinct, {100} Indistinct
2.5-3
PbCrO 4Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
 
Tough
-
-
3.20-3.26
Splintery
{010} perfect
6-7.5
Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)