Manganoan calcite (under SW-UV light right photo)
Origin: Wessels Mine, Kalahari, South Africa
Sample size: 4.75 x 3 x 2.25 cm (top), 4.5 x 3 x 2.5 cm (middle left), 5.5 x
3.25 x 2.5 cm (middle right), 5.5 x 4.5 x 4 cm (bottom left), 5.5 x 4 x 2.25
cm (bottom right)
Origin: Verkhny, Dalnegorsk, Russia
Sample size: 4.5 x 3.8 x 3 cm (top/2nd row), 6.8 x 5.5 x 5 cm (3rd/bottom row)
Calcite twin on
sphalerite
Origin: Elmwood Mine, Carthage, Tenessee
Sample size: 10.5 x 7 x 4.5 cm
Cobaltian calcite
Origin: Bou Azzer, Morocco
Sample size: 10.4 x 4.9 x 3.3 cm
Calcite on
fluorite
Origin: Minerva Mine, Cave-In-Rock District, Hardin Co., Illinois, U.S.A.
Sample size: 8 x 7.5 x 6 cm
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