Museum Collection
This specimen is part of the museum collection catalog.
Not for Sale.
Ettringite
Kalahari Manganese Field, South Africa
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| Classification |
Mineral |
| Tags |
Perky Box
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| Origin Location |
Kalahari Manganese Field, South Africa |
| Description |
This small single crystal of Ettringite shows excellent yellow color, which hints at its sulfur content. This mineral is a hydrous calcium aluminum sulfate. Interestingly, this mineral also forms naturally in Portland cement as a result of a chemical bonding process. Normally the mineral is colorless or white but well formed natural yellow prismatic crystals such as this one are prized by collectors. |
| Luster |
Vitreous |
| Luster (Groundmass) |
Not noted, see photo. |
| Optical Phenomena |
Not noted, see photo. |
| Mineral Group / Note |
Not noted, check reference links below. |
| Handling |
No special handling is required. |
| Modifications |
No modifications. |
| Size Group |
Thumbnail |
| Weight |
Not weighed precisely yet, please inquire. |
| Dimensions |
0.00 cm * 0.00 cm * 0.00 cm |
| Quantity |
1 Specimen |
| Mineral List |
Ettringite: Ca6Al2(SO4)3(OH)12·27H2O
hexacalcium dialuminum sulfur oxygen oxygen hydrogen heptacosa hydrogen oxide *
* 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
Baryte Baryte Pyrargyrite Tourmaline var. Dravite Graphite (Native Carbon) Talc Crystal |
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
Ca Al S O H Ca Fe Al S 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):
ettringite
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| Tools |
Edit Specimen
Search Wikipedia: Ettringite (Wiki)
Search Mindat: Ettringite
Search Web Mineral DB: Ettringite
Search for Handbook of Mineralogy: Ettringite
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