Stilbite (Desmin)
Stilbite, Chalcedony
Nashik District (Nasik District), Maharashtra, India
Item-No.: MIN5807
Price: 67.00 EUR
| 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 |