Staurolite
Fe2Al9Si4O23(OH)
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Staurolite is famous for its cruciform twinned crystals, which form cross-shaped penetration twins. These natural crosses have been collected as good luck charms for centuries. It is an important metamorphic indicator mineral.
| Hệ tinh thể | Monoclinic |
| Phân loại khoáng vật | 09 Silicates |
| Độ cứng Mohs | 7.0-7.5 |
| Tỷ trọng | 3.65-3.77 |
| Màu sắc | Dark reddish-brown to black |
| Ánh | Vitreous |
| Màu vệt | Gray to white |
| Cát khai | Poor {010} |
| Vết vỡ | Subconchoidal |
| Độ trong suốt | Translucent |
| Dạng tinh thể | Prismatic, cruciform twins |
Độ cứng Mohs
Mohs Hardness: 7,0 – 7,5
1 Soft10 Hard
Hệ tinh thể
MonoclinicFrequently Asked Questions
What is the hardness of Staurolite?
Staurolite has a Mohs hardness of 7.0-7.5.
What crystal system does Staurolite belong to?
Staurolite crystallizes in the Monoclinic crystal system.
What color is Staurolite?
Staurolite is typically Dark reddish-brown to black.
What type of luster does Staurolite have?
Staurolite exhibits a Vitreous luster.
What is the chemical formula of Staurolite?
The chemical formula of Staurolite is Fe2Al9Si4O23(OH).