chrysocolla

{{Infobox mineral | name = Chrysocolla | category = Phyllosilicate minerals | boxwidth = | boxbgcolor = #36cacb | image = Chrysocolla-230109.jpg | caption = Chrysocolla specimen from Ray mine, in the Scott Mountain area of Mineral Creek District, Pinal County, Arizona, US | formula = {{chem2|Cu_{2 – x}Al_{x}(H2Si2O5)(OH)4*nH2O}} (x c = 6.7 Å; Z = 1 | color = Blue, cyan (blue-green), green, dark blue to black, brown, rarely yellow | habit = Massive, nodular, botryoidal | system = Orthorhombic Unknown space group | twinning = | cleavage = none | fracture = Irregular/uneven, sub-conchoidal | tenacity = Brittle to sectile | mohs = 2.5–3.5 (7 for chrysocolla chalcedony, high-silica content) | luster = Vitreous to dull | refractive = nα = 1.575–1.585 nβ = 1.597 nγ = 1.598–1.635 | opticalprop = Biaxial (−) | birefringence = δ = 0.023–0.050 | pleochroism = | streak = White to a blue-green color | gravity = 1.9–2.4 | melt = | fusibility = | diagnostic = | solubility = | diaphaneity = Translucent to opaque | other = | references = }}

Chrysocolla ( ) is a hydrous copper phyllosilicate mineral and mineraloid with the formula (x  Chrysocolla-Tyrolite-Clinotyrolite-202106.jpg|Powder-blue chrysocolla as stalactitic growths and as a thin carpet in vugs inside a boulder of nearly solid tyrolite, from the San Simon Mine, Iquique Province, Chile (size: ) Chrysocolla-201585.jpg|Banded white to blue green chrysocolla, from Bisbee, Arizona (size: ) Chrysocolla-bolo.jpg|Chrysocolla and silver bolo tie. This chrysocolla specimen is from the Kennecot Copper Mine in Bingham Canyon, West Valley City, Utah. Brochantite-Chrysocolla-k329b.jpg|Brochantite (emerald green) and chrysocolla, from the Rokana Mine, Zambian Copperbelt