How do I identify Alloclasite?

Alloclasite can be identified by its hardness of 5 on the Mohs scale, Steel gray to silver color. Look for these key characteristics when examining specimens.

What color is Alloclasite?

Alloclasite typically appears in Steel gray to silver. Color can vary depending on impurities and formation conditions.

How hard is Alloclasite?

Alloclasite has a hardness of 5 on the Mohs scale. This gives it moderate hardness.

How to Identify Alloclasite | Properties, Meaning & Uses

What is Alloclasite?

Alloclasite ((Co,Fe)AsS) is a sulfosalt mineral. It is a member of the arsenopyrite group. Alloclasite crystallizes in the monoclinic system and typically forms as columnar to radiating acicular prismatic clusters. It is an opaque steel-gray to silver-white, with a metallic luster and a black streak. It is brittle with perfect cleavage, a Mohs hardness of 5 and a specific gravity of 5.91–5.95. It was first described in 1866 for an occurrence in Romania. Its name is derived from Greek for "other" and "to break," in reference to its distinct cleavage which distinguished it from the similar appearing mineral marcasite. The mineral is monoclinic in the P21 space group.

Alloclasite Market Value Calculator

Estimate the market value of Alloclasite using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.

Alloclasite Localities Map

See where Alloclasite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.