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.
| 결정계 | Monoclinic |
| 광물 분류 | 09 Silicates |
| 모스 경도 | 7.0-7.5 |
| 비중 | 3.65-3.77 |
| 색상 | Dark reddish-brown to black |
| 광택 | Vitreous |
| 조흔색 | Gray to white |
| 벽개 | Poor {010} |
| 단구 | Subconchoidal |
| 투명도 | Translucent |
| 결정 습성 | Prismatic, cruciform twins |
모스 경도
Mohs Hardness: 7.0 – 7.5
1 Soft10 Hard
결정계
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).