Tourmaline

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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 / materialTourmaline
ChemistryComplex borosilicate
Crystal systemTrigonal
ColourGreen, pink, blue, bi-colour and many other colours
Refractive index1.61 – 1.66
Birefringence0.014 – 0.021
Specific gravity3 – 3.26
Mohs hardness7 – 7.5
LusterVitreous
TransparencyTransparent to translucent
ToughnessGood