Schorl
black · Tourmaline family
| Also known as | Tourmaline (Tourmaline family) |
|---|---|
| Colour | Black, Clear, Brown, Red |
| Mohs hardness | 7.0–7.5 |
| Lustre | Vitreous, sometimes resinous |
| Streak | White |
| Crystal system | Trigonal |
| Transparency | Translucent to opaque |
| Cleavage | Indistinct |
| Fracture | Uneven, small conchoidal |
| Specific gravity | 3.06+0.20–0.06 |
What is Schorl?
Tourmaline is a crystalline silicate mineral group in which boron is compounded with elements such as aluminium, iron, magnesium, sodium, lithium, or potassium. This gemstone comes in a wide variety of colors.
How to identify Schorl
- Lustre: Vitreous, sometimes resinous.
- Hardness: Mohs 7.0–7.5 — hard enough to scratch glass.
- Streak: White.
- Habit: Trigonal crystal system.
Schorl in different forms
Stones often confused with Schorl
Frequently asked questions
How hard is Schorl?
Schorl is Mohs 7.0–7.5 on the hardness scale.
What colour is Schorl?
Schorl is typically black, clear, brown, red (Most commonly black, but can range from colorless to brown, red, orange, yellow, green, blue, violet, pink, or hues in-b).