Minerals identify

Know how to recognize them

Gananite

Halide mineral

Gananite (simplified Chinese : 赣南矿; traditional Chinese : gànnánkuàng) is a rare bismuth mineral form of bismuth trifluoride mineral, it belongs to the space group P43m. This means that gananite does not show any colors in cross polarized light, because when polarized light passes through it, it does not split into two perpendicular rays. In other words, because gananite is an isometric mineral, it does not exhibit double refraction. Moreover, this tells us that this mineral is not birefringent Its color in plane-polarized light is blackish-brown, and it does not show pleochroism.

Identification

Color of mineral

Brown
Black
Green

Mohs scale ( mineral hardness )

3.5

The streak

Grey

Luster ( interacts light )

Metallic
Resinous

Crystal ( diaphaneity )

Cubic