Sillimanite
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Physical & Optical Properties
Mohs Hardness
| Mohs | Reference mineral | Sillimanite |
|---|---|---|
| 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 Sillimanite
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About Sillimanite
A sillimanite é um polimorfismo de silicato de alumínio fibroso a prismático encontrado em rochas metamórficas de alto grau, apresentando cores incolores, brancas, acinzentadas, esverdeadas ou castanhas. As variedades gema mais valorizadas apresentam chatoyance sedosa quando talhadas em cabuchão, especialmente exemplares do Sri Lanka e da Índia. O seu forte pleocroísmo e lustre sedoso fazem dela uma pedra apreciada por colecionadores de gemas raras.