Minerals identify

Know how to recognize them

Cymrite

Phyllosilicate

Cymrite is a silicate mineral with the chemical formula BaAl2Si2(O,OH)8·H2O. The mineral is named for Cymru, which is the Welsh

Cymrite, with perfect cleavage and a monoclinic crystalline system, falls in the silicate group. Silicates are formed of Silicon and Oxygen bonding together to form tetrahedra. The symmetry of Cymrite is classified as having a mirror plane. It has a moderate relief, meaning the contrast between the mineral and the epoxy of a thin section makes cymrite easily visible. The birefringence of the mineral is 0.01. Cymrite, being monoclinic is anisotropic with two optic axes.

Identification

Color of mineral

Brown
Green

Mohs scale ( mineral hardness )

2
3

Density ( specific gravity )

1.611
1.619
1.621

Luster ( interacts light )

Silky
Vitreous

Crystal ( diaphaneity )

Monoclinic