Bultfonteinite, Calcite on Matrix
Bultfonteinite, Calcite on Matrix
N'Chwaning II Mine, Kalahari Manganese Field, Northern Cape, South Africa
Size: 10.1 x 5.3 x 4.6 cm (Cabinet)
The specimen is from a find in 2004 and made up of a deposit of calcite and spheres of acicular bultfonteinite. The bultfonteinite are nade up of very fine acicular sprays in a botryoidal form and in numbers. The bultfonteinite have been very well preserved and this is a good sized specimen. The spheres measure up to 0.8cm. Ex Colin & Helga Owen.
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SKU:SAMS-180
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Mineral Sizing Guide
Understanding mineral sizes can help you choose the perfect specimen for your collection. Below is our guide to the standard size categories we use:
| Category |
Size |
Info |
| Thumbnail |
Up to 3 cm |
Thumbnails are small but well-formed mineral specimens that are perfect for display in thumbnail cases. |
| Miniature |
Up to 5 cm |
Great balance between size and detail - larger than thumbnails but still compact enough for easy storage and display. |
| Small-Cabinet |
Up to 9.4 cm |
Small-cabinet specimens offer larger crystal formations while still being easy to handle and display. |
| Cabinet |
Over 9.4 cm |
Ideal for prominent display pieces in a collection. Larger crystal formations and structure. |
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