1752 designs

Ruby Gemstones

Ruby is red corundum: the same mineral as sapphire, the same 9 on the Mohs scale, coloured by chromium. Fine untreated rubies in true pigeon's-blood red are among the most valuable gemstones on earth, carat for carat outpacing diamond.

That puts it among the small handful of coloured stones robust enough for a ring worn every day. We buy loose so you can choose the stone first and the setting second — see our diamond and gemstone guide for how colour, cut and clarity are judged outside the diamond scale, or which gemstones survive everyday wear if it is going to be worn daily. Every stone is independently certified, priced transparently, and can be set into any ring in our collection or into a design of your own.