Wroewolfeite
Wroewolfeite is a rare copper sulfate hydroxide hydrate mineral with the chemical formula Cu4(SO4)(OH)6 * 2H2O. It crystallizes in the monoclinic system and is classified as a sulfate mineral in the Strunz classification (7.DD.10) and as a member of the sulfate group in the Dana classification (31.4.2.1). This mineral is typically found in shades of blue or green and exhibits a vitreous to silky luster. It is relatively soft, with a hardness of approximately 2.5 to 3 on the Mohs scale, and has a low to moderate density. Wroewolfeite is a secondary mineral that forms in copper-rich environments.
Overview
Wroewolfeite is a rare copper sulfate hydroxide hydrate mineral with the chemical formula Cu4(SO4)(OH)6 * 2H2O. It crystallizes in the monoclinic system and is classified as a sulfate mineral in the Strunz classification (7.DD.10) and as a member of the sulfate group in the Dana classification (31.4.2.1). This mineral is typically found in shades of blue or green and exhibits a vitreous to silky luster. It is relatively soft, with a hardness of approximately 2.5 to 3 on the Mohs scale, and has a low to moderate density. Wroewolfeite is a secondary mineral that forms in copper-rich environments.
Etymology
Wroewolfeite is named after Caleb W. Wolfe, in recognition of his contributions to mineralogy. The mineral was officially approved by the International Mineralogical Association (IMA).
How to recognize it
Wroewolfeite can be identified by its softness, with a Mohs hardness of 2.5 to 3, and its characteristic blue or green color. It has a vitreous to silky luster and a low to moderate density. A streak test may show a pale color. Due to its softness and rarity, it is easily confused with other copper hydroxide or sulfate minerals, but its chemical composition and crystal system can help distinguish it.
Trivia
Wroewolfeite is notable for its unique chemical composition, which includes both sulfate and hydroxide groups in a hydrated structure. It is a rare mineral, with only a few known occurrences worldwide. Its name honors Caleb W. Wolfe, a significant figure in mineralogical studies.