Minerals identify

Know how to recognize them

Cuspidine

Sorosilicate

Cuspidine is a fluorine silicate mineral) with formula: Ca4(Si2O7)(F,OH)2. Cuspidine crystallizes in the monoclinic crystal system and occurs as acicular to spear shaped pale red to light brown crystals. It is a member of the wöhlerite group.

Cuspidine was first described in 1876 for an occurrence in Monte Somma The name is from the Greek cuspis for spear from its characteristic crystal form. Cuspidine occurs as crystals in tuff from Monte Somma. In the Franklin, New Jersey mine area it occurs in contact metamorphosed Mountain, Iraq bearing skarn, hornblende, biotite, wollastonite , magnetite

Identification

Color of mineral

Brown
Red

Mohs scale ( mineral hardness )

5
6

Density ( specific gravity )

1.586
1.589
1.598

Luster ( interacts light )

Vitreous

Crystal ( diaphaneity )

Monoclinic