Mineral karbonat
caption: Kristal kalsit dari Tambang Sweetwater, Distrik Viburnum Trend, Reynolds County, Missouri ; 6.2 × 6 × 3.3 cm
caption: Rodokrosit , Tambang Sweet Home , Alma, Colorado; 5.2 × 4.2 × 2.3 cm
caption: Smithsonit , Tambang Silver Bill, Pegunungan Dragoon, Cochise County, Arizona ; 4.8 × 4.1 × 2.4 cm
caption: Dolomit dengan kalsit dan kalkopirit dari Picher Field, Tri-State district , Cherokee County, Kansas ; 12.0 × 9.7 × 4.3 cm
caption: Azurit dan malasit, Pegunungan Beaver Dam, Washington County, Utah ; 5.1 × 3.9 × 2.4 cm