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Cyanotrichite

Sulfate mineral

Cyanotrichite is a hydrous copper sulfate mineral ·2H2O, also known as lettsomite. Cyanotrichite forms velvety radial acicular crystal aggregates of extremely fine fibers. It crystallizes in the orthorhombic system and forms translucent bright blue acicular crystal clusters or drusey is 2 and the specific gravity ranges from 2.74 to 2.95. Refractive indices are nα=1.588 nβ=1.617 nγ=1.655.

Identification

Color of mineral

Blue
Azure

Mohs scale ( mineral hardness )

1
3

The streak

Blue

Density ( specific gravity )

1.588
1.617
1.655

Luster ( interacts light )

Silky

Crystal ( diaphaneity )

Monoclinic