Kyanite
Al2SiO5
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Kyanite is remarkable for having variable hardness depending on crystal direction — 4.5 parallel to the length and 7 across. It is an important metamorphic index mineral indicating high-pressure conditions. Its blue color makes it a minor gemstone.
| Кристаллическая система | Triclinic |
| Класс минерала | 09 Silicates |
| Твёрдость по Моосу | 4.5-7.0 |
| Удельный вес | 3.53-3.65 |
| Цвет | Blue, white, gray, green |
| Блеск | Vitreous |
| Черта | Colorless |
| Спайность | Perfect {100} |
| Излом | Splintery |
| Прозрачность | Translucent |
| Кристаллический облик | Bladed, columnar |
Твёрдость по Моосу
Mohs Hardness: 4,5 – 7,0
1 Soft10 Hard
Кристаллическая система
TriclinicFrequently Asked Questions
What is the hardness of Kyanite?
Kyanite has a Mohs hardness of 4.5-7.0.
What crystal system does Kyanite belong to?
Kyanite crystallizes in the Triclinic crystal system.
What color is Kyanite?
Kyanite is typically Blue, white, gray, green.
What type of luster does Kyanite have?
Kyanite exhibits a Vitreous luster.
What is the chemical formula of Kyanite?
The chemical formula of Kyanite is Al2SiO5.