Museum Collection
This specimen is part of the museum collection catalog.
Not for Sale.
Riebeckite var. Crocidolite
Transvaal Supergroup, Griqualand, Northern Cape, South Africa
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| Classification |
Mineral |
| Tags |
Toxic
Fragile
Type Locality
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| Origin Location |
Transvaal Supergroup, Griqualand, Northern Cape, South Africa |
| Description |
A fine old collection example of the rare asbestiform mineral riebeckite, also referred to as crocidolite, which is a blue form of the popular gemstone tiger's eye, from its famous occurrence in the Transvaal in South Africa. |
| Luster |
Silky |
| Luster (Groundmass) |
Dull |
| Optical Phenomena |
Chatoyant |
| Mineral Group / Note |
Fibrous Asbestiform |
| Handling |
Hazardous- Sheds Asbestos Fibers - Wear Gloves/Dust Mask |
| Modifications |
No modifications. |
| Size Group |
Small Cabinet |
| Weight |
Not weighed precisely yet, please inquire. |
| Dimensions |
Not measured precisely yet, please inquire. |
| Quantity |
1 Specimen |
| Mineral List |
Riebeckite: [box]Na2(Fe2+3Fe3+2)Si8O22(OH)2
sodium tricosiron iron octasilicon docosoxygen hydroxide *
* Formula chemical names are auto-generated - may be incorrect on complex formulas.
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Specimen Analysis |
Color Table
Colors found in this specimen image are shown below. Higher number indicates greater concentration of that color.
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Similarly Colored Minerals:
Minerals with similar color profiles are shown below.
How it Works
Fluorite Beryl var. Aquamarine / Quartz Microcline var. Amazonite w/ Smoky Quartz Beryl var. Aquamarine / Quartz Topaz var. Imperial Quartz / Pyrolusite / Goethite |
Elements in this Specimen:
Elements that are part of the official chemical structure of the minerals occurring in this specimen are indicated below.
How it Works
Element List:
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Minerals with Similar Chemistry:
Minerals that are similar in terms of their chemical makeup are shown below.
How it Works
This Mineral Formula Similar Mineral Formula
Na Fe Si O H Na Ca Fe Si O H
Na Fe Si O H Na Mg Fe Si O H
Na Fe Si O H Na Mn Fe Si O H
Na Fe Si O H Na Fe Al Si O H
Na Fe Si O H Na Fe Al Si O H
Na Fe Si O H Na Fe Al Si O H
Na Fe Si O H Na Fe Ti Si O H
Na Fe Si O H Na Fe Mn Si O H
Na Fe Si O H Na Fe Si Al O H
Na Fe Si O H Na Fe Li Si O H
Na Fe Si O H Na Fe Si Al O H
Na Fe Si O H Na K Fe Si O H
Na Fe Si O H Na Fe Al Si O H
Na Fe Si O H Na Li Fe Si O H
Na Fe Si O H Na Mg Fe Si O H
Na Fe Si O H K Na Fe Si O H
Na Fe Si O H Na Li Fe Si O H
Na Fe Si O H Na Fe Si Al O H
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Mineral Group:
Search the catalog for minerals that share the same group as this specimen:
How it Works
Structural Group(s):
Fleischers Group(s):
amphibole-group 4 Na
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| Tools |
Edit Specimen
Search Wikipedia: Riebeckite (Wiki)
Search Mindat: Riebeckite
Search Web Mineral DB: Riebeckite
Search for Handbook of Mineralogy: Riebeckite
Search Wikipedia: Crocidolite (Wiki)
Search Mindat: Crocidolite
Search Web Mineral DB: Crocidolite
Search for Handbook of Mineralogy: Crocidolite
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