Colemanite
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Physical & Optical Properties
Mohs Hardness
| Mohs | Reference mineral | Colemanite |
|---|---|---|
| 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 Colemanite
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About Colemanite
La colemanita es un borato de calcio hidratado que cristaliza en el sistema monoclínico, formando cristales prismáticos o masas granulares de color incoloro a blanco, amarillento o grisáceo, con brillo vítreo. Es uno de los principales minerales industriales de boro, utilizado en la fabricación de vidrio resistente al calor (pyrex), fibras de vidrio, detergentes y esmaltes. Se forma en depósitos lacustres de evaporitas. Los mejores cristales provienen de California y Nevada (EE.UU.) y de Turquía. Aunque no es una gema convencional, los cristales bien formados y transparentes son ocasionalmente facetados para coleccionistas de minerales inusuales.