Cyanotrichite (rare locality specimen)

Item Description

Cyanotrichite is fairly hard to find from most secondary copper deposits in the United States. Most knowledgeable collectors will tell you that the Grand View Mine in Arizona is most well-known locality for the species, but the second most productive mine could very well be the Peacock Mine in Lemhi County, Idaho. The specimens from Arizona are very similar to the Idaho material with similar radiating "velvety", tiny "hair-like" acicular groups of brilliant blue needles of Cyanotrichite associated with deep blue Azurite and green Malachite on oxidized matrix. This piece is a very attractive specimen of this seldom-seen material featuring beautiful acicular radiating Cyanotrichites that look fantastic under magnification along with the associated Azurite and Malachite. It should be noted that the authenticity of this locality was under debate, but was confirmed in Minerals News Vol 38 No. 4 (2022) by different sources. A great old-time specimen for any fan of secondary ore minerals, or specimens from Idaho.
From the collection of Geary Murdock