Thaumasite
N'Chwaning II Mine, Kalahari Manganese Field, Northern Cape, South Africa.
Photograph 1 of 5
Akermanite-Gehlenite & Andradite
N'Chwaning I Mine, Kalahari Manganese Field, Northern Cape, South Africa
Reference specimen
Dimensions
Display units
- Metric
- 3.1 x 2.3 x 1.7 cm
- Inches
The specimen has aligned epitaxial fibrous crystals of akermanite-gehlenite on manganoan calcite. This would be a rare set of minerals for the locality. These minerals have formed over a thin deposit of light red andradite made of a layer of small crystals on and inside of the matrix. The gehlenite is made up of tiny fibrous crystals something like grass seeds. The xrd analysis can be emailed.
Specimen data
- Specimen number
- SAMS-296
- Size class
- Miniature
- Country
- South Africa
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Mineral sizing guide
Longest dimension: Thumbnail up to 3 cm, Miniature up to 5 cm, Small Cabinet up to 9.4 cm, Cabinet over 9.4 cm. Size guide
