Untreated · Swiss Certified · Direct from Source
Precious Gemstones, exactly as the earth made them.
A curated portfolio of high quality untreated rubies, sapphires and spinels — each one independently certified, ethically sourced, and offered directly without the markup of the showroom floor.
✦ GRS Swiss Certified
✦ No Heat · No Treatment
✦ Insured Worldwide Delivery
✦ 30-Day Return Guarantee
The Collection
Four Types of Precious Gemstones
Every gemstone is unique and individually certified. Browse by type, or view the full portfolio.
Hand-selected
Featured Gemstones
Handcrafted Jewellery
Featured jewellery
What does "untreated" or “unheated” actually mean?
The vast majority of rubies and sapphires on the market are heat-treated to improve colour and clarity. An untreated, GRS-certified stone is exactly as nature formed it — rarer, more valuable, and fully documented. Understanding the difference is the first step to buying well.