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> Minerals
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Heulandite-Ca
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| Heulandite
 Jalgaon District, Maharastra, Indien
Item-No.: MINS1541
Price: 5.00 EUR
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| Heulandite
Jalgaon District, Maharastra, Indien
Item-No.: MINS1543
Price: 6.00 EUR
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| Heulandite
Jalgaon District, Maharastra, Indien
Item-No.: MINS1544
Price: 6.00 EUR
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| Heulandite
Jalgaon District, Maharastra, Indien
Item-No.: MINS1547
Price: 5.00 EUR
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| Heulandite
Jalgaon District, Maharastra, Indien
Item-No.: MINS1690
Price: 6.00 EUR
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| Heulandite
Votrubec quarry, Kozákov, Liberec Region, Bohemia, Czech Republic
Item-No.: MIN0342
Price: 55.00 EUR
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| 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 |
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