Opal-An on Smoky Quartz with Cassiterite
Opal-An on Smoky Quartz with Cassiterite
Erongo Mountains, Karibib Constituency, Erongo Region, Namibia
Size: 3.3 x 1.8 x 1.1 cm (Miniature)
The specimen has opal-an on a smoky quartz cluster with small cassiterite crystals attached. The opal-an has a bubble-like formation and is spectacularly daytime fluorescent. The opal-an is very pure and gemmy. The small cassiterite crystals on the quartz is an unusual association.
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SKU:SAMS-111
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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 |
| Ā 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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