This contemporary piece is created by award winning designer Chatham. Chatham gemstones are the product of more than 75 years of refinement of the lab-grown process. They are well known for creating the jewellery industry's highest quality lab grown gemstones. Chatham gemstones are the same physically, chemically, and optically as top quality mined gemstones but come without the social or environmental degradation. Canadian Authorized Dealer.