Chalcoalumit crystals from the Grandview Mine, Grand Canyon, AZ, USA – miniature specimen as unique piece
This colorful miniature specimen displays Chalcoalumite in an intense blue-green habit on contrasting matrix. The surface is covered by numerous fine crystalline to botryoidal crystal aggregates that create an exceptionally attractive texture. The vivid turquoise, blue and green colors are characteristic of secondary copper minerals formed within the oxidation zone of the deposit. The crystals form attractive coatings and aggregates that are clearly visible across the display surface, presenting this rare mineral to excellent effect.
Geology & Origin
Chalcoalumite is a rare hydrated copper aluminum sulfate that forms as a secondary mineral in the oxidation zones of copper-rich ore deposits. The Grandview Mine at the Grand Canyon in Arizona is one of the world's most famous localities for rare secondary copper minerals. Weathering of primary copper ores produced an exceptional variety of colorful minerals, including numerous rare sulfates, phosphates and carbonates. The locality is highly regarded among mineral collectors and is well known for producing outstanding specimens featuring rare mineral species.