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> Minerals
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Stilbite (Desmin)
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| Stilbite, Chalcedony
 Nashik District (Nasik District), Maharashtra, India
Item-No.: MIN5807
Price: 67.00 EUR
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| Synonyms: |
Desmine, Epidesmine, Garbenstilbite, Puferite |
| IMA Status: |
Not recognize. The name now refers to the minerals Stilbite-Ca and Stilbite-Na |
| Classification: |
Silicates, Tektosilicates, Zeolite Group |
| Chemical formula: |
Stilbite-Ca: NaCa4(Si27Al9)O72 • 28 H2O |
| Chemical formula: |
Stilbite-Na: Na9(Si27Al9)O72 • 28 H2O |
| Crystal system: |
monoclinic |
| Density (g/cm3): |
2,18 - 2,2 measured, 2,23 calculated |
| Cleavage: |
Perfect on {010} indistinct on {100} |
| Fracture: |
Irregular/uneven, sub-conchoidal |
| Hardness (Mohs): |
3,5 - 4 |
| Colour: |
Colourless, white, pink, yellowish, orange, rose, brownish, grey |
| Lustre: |
Vitreous, Pearly |
| Streak: |
White |
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