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Additional recommended knowledge
Coloradoite is a very soft mineral with a Mohs hardness of 1.9, and cleaves poorly. It is in the sphalerite group with an isometric hexoctahedral crystal structure. It has an iron-black metallic lustre. The mineral decomposes on heating. Its specific gravity is 8.07.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Coloradoite". A list of authors is available in Wikipedia.