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Additional recommended knowledge
It crystallizes in the monoclinic prismatic system and typically occurs as vitreous bright yellow to red botryoidal to reniform masses and radiating crystal prisms. Its specific gravity is 2 to 2.1 and its Mohs hardness is 2.
It occurs in arid climates as a secondary alteration product of pyrite bearing deposites.
It was first described in 1828 for an occurrence in the Falu mine of Falun, Dalarna, Sweden. It was named for its grape like appearance from Greek botrys for bunch of grapes and genos to bear.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Botryogen". A list of authors is available in Wikipedia.|