Twin
Origin: Leiping, Hunan Province, China
Sample size: 5.5 x 4.8 x 3.8 cm
Origin: O&G Quarry #2, Southbury, New Haven County, Connecticut, U.S.A.
Sample size: 2.5 x 2 x 1.5 cm
Calcite on
sphalerite
Calcite on
quartz
Origin: Elmwood Mine, Carthage, Tennessee
Sample size: 8 x 5.5 x 4.5 cm (top 3), 3.3 x 2.8 x 1.5 cm (bottom 2)
Cobaltian calcite
Origin: Kakanda, Zaire
Sample size: 6.8 x 5 x 3.5 cm
Manganoan calcite
Origin: Montreal Mine, Montreal, Wisconsin, U.S.A.
Sample size: 4.5 x 3 x 3 inches
Calcite with
mottramite
Origin: Tsumeb, Namibia
Ex. M. Dodge collection
Sample size: 2.6 x 2.5 x 1.6 cm
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