Conichalcite, Chrysocolla

This striking specimen features a vivid green crust of conichalcite covering one entire side of the matrix, contrasting beautifully with the reverse where we see a rich coating of robin’s-egg blue chrysocolla. Sourced from the famous and now-extinct Gold Hill Mine in Utah, this locality is renowned for its diverse assemblage of secondary copper and other metal minerals.

The Gold Hill mining district, which ceased production in 1945, is historically significant for its arsenic, copper, gold, lead, silver, zinc, tungsten, and barite mineralization. This specimen exemplifies the rich secondary mineralization for which the mine is known, displaying both the deep green hues of conichalcite and the striking turquoise-blue of chrysocolla. An excellent, colourful, and highly collectible specimen from this classic locality. For more details on the mineralogy of Gold Hill, see the 1993 Mineralogical Record (Vol. 24, No. 1).