Heulandite-Ca
Heulandite
Item-No.: MINS1541 Price: 5.00 EUR
Jalgaon District, Maharastra, Indien
Heulandite
Item-No.: MINS1543 Price: 6.00 EUR
Jalgaon District, Maharastra, Indien
Heulandite
Item-No.: MINS1544 Price: 6.00 EUR
Jalgaon District, Maharastra, Indien
Heulandite
Item-No.: MINS1547 Price: 5.00 EUR
Jalgaon District, Maharastra, Indien
Heulandite
Item-No.: MINS1690 Price: 6.00 EUR
Jalgaon District, Maharastra, Indien
Heulandite
Item-No.: MIN0342 Price: 55.00 EUR
Votrubec quarry, Kozákov, Liberec Region, Bohemia, Czech Republic
| Synonyms: | Heulandite |
| Classification: | Silicates, tektosilicates with zeolitic H2O, zeolite family, heulandite group |
| Chemical formula: | (Ca,Na)5(Si27Al9)O72 · 26H2O |
| Crystal system: | Monoclinic |
| Density (g/cm3): | 2,1 - 2,2 measured, 2,17 calculated |
| Tenacity: | Brittle |
| Cleavage: | Perfect on the {010} |
| Fracture: | Irregular/uneven, sub-conchoidal |
| Hardness (Mohs): | 3,5 - 4 |
| Colour: | White, colorless, red, yellow, brown, green |
| Lustre: | Vitreous, pearly on cleavage |
| Streak: | White |
| Type locality: | Strathclyde, Scotland, UK |