Oyellite with Ettringite
Oyellite with Ettringite
N'Chwaning II Mine, Kalahari Manganese Field, Northern Cape, South Africa
Size: 7 x 3 x 3.1 cm (Small Cabinet)
The specimen has ettringite with brucite and oyellite and manganite in association on a band of sedimentary lamellar ironstone. The ettringite has a single doubly terminated crystal on an opposite face to a clustered single large crystal with smaller crystals too. The main ettringite crystal measures 2.6cm.
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SKU:SAMS-230
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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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