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 / material | Corundum |
|---|---|
| Chemistry | Al2O3 |
| Crystal system | Trigonal |
| Colour | Blue is classic, but sapphire occurs in many colours except red |
| Refractive index | 1.762 – 1.77 |
| Birefringence | 0.008 |
| Specific gravity | 3.99 – 4 |
| Mohs hardness | 9 |
| Luster | Vitreous |
| Transparency | Transparent to translucent |
| Toughness | Excellent |