General Information:
Chemical Formula:
(Mg,Fe++)(Fe+++,Al,Mg,Ti,Fe++)(BO3)O
Environment:
Disseminated in and between suanite crystal grains in crystalline magnesian marble.
IMA Status:
Approved IMA
Locality:
Zhuanmiao boron deposit, Kuandian bounty, Liaoning Province, People's Republic of China.
Name Origin:
Named after Prof. Yuan Fuli (1893-1987).
Physical Properties:
Cleavage:
[100] Perfect
Color:
black.
Density:
4.02
Diaphaniety:
Nearly opaque
Habits:
Disseminated - Occurs in small, distinct particles dispersed in matrix., ,
Hardness:
6-6.5 - Orthoclase-Pyrite
Luster:
Adamantine
Streak:
brownish black
More details...