About Chatham

Learn About the brand

Chatham has been the pioneer of laboratory-grown gemstones since Carroll Chatham first grew an emerald crystal in his San Francisco lab in the 1930s. Today, Chatham is recognized worldwide as the industry leader in luxury lab-grown gems and diamonds, producing emeralds, sapphires, rubies, and more with the same physical, chemical, and optical properties as their mined counterparts. Every Chatham stone comes with a lifetime warranty and a certificate of authenticity. Smart. Beautiful. Real.