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
Conchoidal, Conchoidal, Brittle
1.6 Cleavage
On {10 1 1} perfect; parting on {10 1 2}
Perfect on {001}, good on {110}
1.7 Mohs Hardness
1.8 Chemical Composition
MnCO3
KNa 4Ca 4Si 8O 18(CO 3) 4(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)