Tourmaline
Complex borosilicate
Add one script tag to your page:
<div data-mineralfyi="entity" data-slug="tourmaline"></div>
<script src="https://cdn.jsdelivr.net/npm/mineralfyi-embed@1/dist/embed.min.js" defer></script>
Embed as an iframe:
<iframe src="https://mineralfyi.com/iframe/entity/tourmaline/?style=modern&theme=light" width="420" height="400" frameborder="0" loading="lazy" style="border:0;border-radius:10px;max-width:100%"></iframe>
Paste the URL in WordPress, Medium, or Ghost:
https://mineralfyi.com/mineral/tourmaline/
Shields.io-compatible SVG badge:
Web Component:
<mineralfyi-entity slug="tourmaline"></mineralfyi-entity>
<script src="https://cdn.jsdelivr.net/npm/mineralfyi-embed@1/dist/embed.min.js" defer></script>
Tourmaline is a group of complex borosilicate minerals famous for their wide range of colors. Watermelon tourmaline shows pink centers with green rims. The most common variety, schorl (black), accounts for 95% of all tourmaline.
| Crystal System | Trigonal |
| Mineral Class | 09 Silicates |
| Mohs Hardness | 7.0-7.5 |
| Specific Gravity | 2.82-3.32 |
| Color | Black, green, pink, blue, watermelon |
| Luster | Vitreous |
| Streak | Colorless |
| Cleavage | None |
| Fracture | Conchoidal to uneven |
| Transparency | Transparent |
| Crystal Habit | Prismatic with triangular cross-section |
Mohs Hardness
Mohs Hardness: 7.0 – 7.5
1 Soft10 Hard
Crystal System
TrigonalExplore on Science FYI
Frequently Asked Questions
What is the hardness of Tourmaline?
Tourmaline has a Mohs hardness of 7.0-7.5.
What crystal system does Tourmaline belong to?
Tourmaline crystallizes in the Trigonal crystal system.
What color is Tourmaline?
Tourmaline is typically Black, green, pink, blue, watermelon.
What type of luster does Tourmaline have?
Tourmaline exhibits a Vitreous luster.
What is the chemical formula of Tourmaline?
The chemical formula of Tourmaline is Complex borosilicate.