Diamond Engagement Rings
Sapphire Engagement Rings
Emerald Engagement Rings
Ruby Engagement Rings
Rings
Earrings
Necklaces
Brooches
Bracelets & Bangles
Cufflinks
Pendants
Chains
Tie Pins
Lockets
Charms
Signet Rings
Seals
Curiosities
UK / £
USA / $
AU / $
Experts since 1975
-
Your Shopping Bag is empty
Free Worldwide Delivery
View All
Diamond
Sapphire
Emerald
Ruby
Corondum
A mineral (aluminium oxide) that is the hardest mineral other than the diamond; its hardness on the Mohs scale is 9.
Back to Glossary
The Gift Guide
Latest Finds
What's Hot
Expert Picks
The Archive
Sale
Eras
Collections
Contact
Book Appointment