1940's Synthetic Sapphire and Diamond Bracelet1940's Synthetic Sapphire and Diamond Bracelet 7. 00 Carats Sapphire 1. 10 TDW. Constructed In The Style of a Famous Oscar Heyman Design, This Bracelets Synthetic Sapphires even Fooled a Master Gemologist as Being Natural. They are Synthetic As Was Common Practice of The Era. A Wonderfull Design. Synthetic sapphires have a long history in the jewelry industry, dating back to the early 1900s. The first synthetic sapphire was created in 1902 by a French