Sapphire

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Sapphire – Overview

Intro

Sapphire is a broad corundum category celebrated for blue stones as well as a wide range of fancy colours.

Overview

This starter entry positions sapphire as a cornerstone fine-jewellery gemstone with strong durability, flexible design use, and rich educational content around colour and treatment.

About

This starter entry positions sapphire as a cornerstone fine-jewellery gemstone with strong durability, flexible design use, and rich educational content around colour and treatment. Sapphire is presented here as a structured gemstone record ready for linked buyer guides, research posts, and media galleries.

Key Properties

Mineral / materialCorundum
ChemistryAl2O3
Crystal systemTrigonal
ColourBlue is classic, but sapphire occurs in many colours except red
Refractive index1.762 – 1.77
Birefringence0.008
Specific gravity3.99 – 4
Mohs hardness9
LusterVitreous
TransparencyTransparent to translucent
ToughnessExcellent