Learn About

Montana Sapphire Heat Treatments

Learn About

Heat Treating Sapphires

Sapphire heat treating has been practiced worldwide for hundreds of years. Heat treating is a process of taking sapphires to high temperatures, and the high temperatures react with natural elements already present in the sapphires to enhance the stones' best color. Heat treating produces dramatic results by minimizing color zoning and improving the stone's saturation. For example, a blue sapphire can have green undertones, and heat treating would optimize the gem's color intensity and clarity by minimizing those undertones. While there is always some risk of fracture, all stones at Sapphire Gallery, in Philipsburg, Montana, are heat treated locally in a controlled atmosphere with optimal conditions for improving the quality and value of the stones.


I would like to thank all the staff at The Sapphire Gallery for the beautiful ring and earrings which have made Judy's anniversary a truly memorable occasion! The five sapphires are absolutley gorgeous and my gemologist felt they were among the best matched stones he'd ever seen. Judy and I agree that the 2 1/2 carat sapphire center stone in her ring is her finest gem. Charles, Virginia