Continuing our picture gallery of minerals and gemstones in the Smithsonian Museum of Natural History collection, this post features some exceptional carbonate minerals on display in the museum.
Click the pictures below for a larger version pop-up.
Large
Calcite Crystal on Calcite from Shullsberg, Wisconsin
Calcite with Duftite Inclusions, Resulting in Green Color, From Tsumeb, Namibia
Manganoan
Calcite from the Idarado Mine, Ouray, Colorado, Namibia
Brown
Calcite with
Goethite Inclusions from Santa Eulalia, Chihuahua, Mexico
Large
Calcite Scalenohedron from Joplin, Missouri
Deep Red
Rhodochrosite from N'Chwaning Mine, Hotazel, South Africa
Large
Concentric Rhodochrosite Slab from Catamarca, Argentina
Huge
botryoidal Malachite Blob from Shaba, D.R. Congo
Smithsonite Stalagmites from Tsumeb, Namibia
Nest-Shaped
Malachite Formation from the Copper Queen Mine, Bisbee, Arizona
Prismatic
Azurite Crystal from the Copper Queen Mine, Bisbee, Arizona
Giant
Calcite Crystal Cluster from the Woodchuck Mine, Cardin, Oklahoma