Calcite

  

Origin: Tsumeb Mine, Tsumeb, Namibia, Africa

Sample size: 7 x 4 x 4 cm, bladed shaped crystals of calcite to 3.7 cm across

 

  

Calcite on dolomite

Origin: Tsumeb Mine, Tsumeb, Namibia, Africa

Sample size: 14 x 8 x 6 cm

 

  

 

  

 

  

Cobaltian calcite

Origin: Aghbar Mine, Bou Azzer, Morocco

Sample size: 8 x 6.5 x 5 cm (top/2nd row), 4.8 x 3 x 2 cm (3rd/4th row), 4.6 x 3.5 x 2.2 cm (5th/bottom row)

 

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Origin: Tsumeb mine, Tsumeb, Namibia

Sample size: 32 x 18 x 30 mm

 

  

Calcite with minor marcasite

Origin: Linwood Mine, Buffalo, Scott Co., Iowa, U.S.A.

Sample size: 5 x 2.8 x 2.6 cm

 

  

Chocolate coloured "dogtooth" calcite covered with silky white gypsum

Origin: Santa Eulalia District, Mun. de Aquiles Serdan, Chihuahua, Mexico

Sample size: 10.5 x 6.4 x 4.4 cm

 

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