1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Uneven, Conchoidal, Conchoidal to uneven, Brittle
Uneven, Uneven, Gemstones of the world (2001) More from other references
1.6 Cleavage
On {10 1 1} perfect; parting on {10 1 2}
{001} Indistinct, {???} Indistinct
1.7 Mohs Hardness
1.8 Chemical Composition
MnCO3
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references