Bultfonteinite & Olmiite
Bultfonteinite & Olmiite
N'Chwaning II Mine, Kalahari Manganese Field, Northern Cape, South Africa
Size: 4 x 4 x 2.3 cm (Miniature)
The specimen is with formations of brown olmiite with a few sprays of bultfonteinite sporadically deposited. With the olmiite elongate prismatic crystals bunched together grow to form ball formations. The bultfonteinite consists of fine white needles that grow as radial sprays of long needles, not always of the same length.
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SKU:SAMS-290
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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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