Ettringite

  

Complete crystal of ettringite with small jet-black hausmannite and gaudefroyite crystals on the surface

Origin: N'Chwaning Mine, Kalahari Fields, South Africa

Sample size: 4.5 x 1.5 x 1.5 cm

 

  

  

Ettringite very closely intergrown with sturmanite

  

 

  

 

  

Origin: N'Chwaning II Mine, Kalahari, South Africa

Sample size: 4.5 x 3 x 2 cm (top/2nd/3rd row), 5 x 4.5 x 3 cm (4th row), 3 x 1.2 x 1 cm (5th row), 1.6 x 1.5 x 1.3 cm (bottom)

 

   

Ettringite on calcite (left)

   

Ettringite very closely intergrown with sturmanite (right)

  

Origin: N'Chwaning II Mine, Kalahari, South Africa

Sample size: 2.2 x 2 x 1.5 cm (top left), 2.5 x 2.2 x 1.8 cm (top middle), 3 x 2 x 1 cm (top right), 2 x 1.3 x 1.3 cm  (2nd row left), 2.2 x 2 x 1.2 cm (2nd row middle), (2nd row right), 3 x 1.6 x 0.8 cm (3rd row)

 

   

Origin: N'Chwaning Mine, near Kuruman, South Africa

Sample size: 4.5 x 3.2 x 2.5 cm

 

  

Origin: N'Chwaning Mine, South Africa

Sample size: 5 x 3.5 x 2 cm

 

Photo courtesy of: 

  

Origin: N'Chwaning mine #1, Kalahari Mn Field, Northern Cape Province, South Africa

ex Lloyd Tate collection

Sample size: 2.5 x 1.7 x 4.3 cm

 

  

Origin: Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa

Sample size: 24 x 16 x 13 mm

 

Photo courtesy of: 

Page 2     Page 3     Page 4     Page 5     Page 6     Page 7     Page 8     Page 9     Page 10     Page 11     Page 12     Page 13