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> Minerals
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Staurolite
The name of Staurolite is derived from the Greek in reference to the common twinning. A characteristic 60 degrees cross-shape is known as Saint Andrew´s penetration twinning more rare 90 degrees cross-shape as cruciform penetration twinning. Staurolite is a typical regional metamorphic mineral of intermediate grade.
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| Staurolite
 Pestsovye Keivy, Keivy Mountains, Murmansk Oblast, Russia
Item-No.: MINS5846
Price: 65.00 EUR
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| Staurolite
Pestsovye Keivy, Keivy Mountains, Murmansk Oblast, Russia
Item-No.: MINS5845
Price: 85.00 EUR
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| Staurolite
Pestsovye Keivy, Keivy Mountains, Murmansk Oblast, Russia
Item-No.: MINS6370
Price: 100.00 EUR
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| Staurolite
Pestsovye Keivy, Keivy Mountains, Murmansk Oblast, Russia
Item-No.: MINS4893
Price: 58.00 EUR
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| Staurolite
Pestsovye Keivy, Keivy Mountains, Murmansk Oblast, Russia
Item-No.: MINS4896
Price: 52.00 EUR
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| Staurolite
Pestsovye Keivy, Keivy Mountains, Murmansk Oblast, Russia
Item-No.: MINS4897
Price: 35.00 EUR
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| Staurolite
Pestsovye Keivy, Keivy Mountains, Murmansk Oblast, Russia
Item-No.: MINS4899
Price: 46.00 EUR
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| Staurolite
Pestsovye Keivy, Keivy Mountains, Murmansk Oblast, Russia
Item-No.: MINS4904
Price: 62.00 EUR
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| Staurolite
Pestsovye Keivy, Keivy Mountains, Murmansk Oblast, Russia
Item-No.: MINS4900
Price: 43.00 EUR
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| Staurolite
Pestsovye Keivy, Keivy Mountains, Murmansk Oblast, Russia
Item-No.: MINS6371
Price: 53.00 EUR
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| Staurolite
Pestsovye Keivy, Keivy Mountains, Murmansk Oblast, Russia
Item-No.: MINS4894
Price: 46.00 EUR
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| Synonyms: |
Croisette, Fairy Stone |
| Classification: |
Silicates, Nesosilicates, Staurolite Group |
| Chemical formula: |
Fe2+2Al9Si4O23(OH) |
| Crystal system: |
Monoclinic |
| Density (g/cm3): |
3.74 - 3.83 measured, 3.686 calculated |
| Tenacity: |
Brittle |
| Cleavage: |
Distinct on {010} |
| Fracture: |
Sub-Conchoidal |
| Hardness (Mohs): |
7 - 7,5 |
| Colour: |
Dark brown, brownish-black, red-brown |
| Lustre: |
Sub-Vitreous, Resinous |
| Streak: |
White to grayish |
| Transparency: |
Translucent |
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