Thaumasite
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Physical & Optical Properties
Mohs Hardness
| Mohs | Reference mineral | Thaumasite |
|---|---|---|
| 1 | Talc | |
| 2 | Gypsum | |
| 3 | Calcite | |
| 4 | Fluorite | |
| 5 | Apatite | |
| 6 | Orthoclase | |
| 7 | Quartz | |
| 8 | Topaz | |
| 9 | Corundum | |
| 10 | Diamond |
Crystal System
Value & Market
Where to Buy Thaumasite
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About Thaumasite
Thaumasite is a rare calcium silicate sulfate carbonate mineral that forms colorless to white acicular or prismatic hexagonal crystals in low-temperature hydrothermal veins and as a weathering product in building materials, particularly concrete affected by sulfate attack. It occurs in classic localities such as LÃ¥ngban, Sweden and in oxidized iron ore deposits in the Alps. Specimens are primarily of scientific interest, prized by collectors for delicate crystal habit.