Tourmaline – Overview
Intro
Tourmaline is one of the trade's most varied coloured gemstone families, offering a broad palette from pastel to electric hues.
Overview
This starter entry positions tourmaline as a flexible design gemstone where species, colour, pleochroism, and cut all influence the final look.
About
This starter entry positions tourmaline as a flexible design gemstone where species, colour, pleochroism, and cut all influence the final look. Tourmaline is presented here as a structured gemstone record ready for linked buyer guides, research posts, and media galleries.
Key Properties
| Mineral / material | Tourmaline |
|---|---|
| Chemistry | Complex borosilicate |
| Crystal system | Trigonal |
| Colour | Green, pink, blue, bi-colour and many other colours |
| Refractive index | 1.61 – 1.66 |
| Birefringence | 0.014 – 0.021 |
| Specific gravity | 3 – 3.26 |
| Mohs hardness | 7 – 7.5 |
| Luster | Vitreous |
| Transparency | Transparent to translucent |
| Toughness | Good |