Blue Color-Change Sapphire, 0.89 ct Faceted from Tanzania

This is an untreated sapphire from Songea, Tanzania that has a pleasing greenish blue color and great brilliance for an emerald cut stone. It shows a slight shift toward purplish blue under incandescent light, but not enough to be considered a "color change" sapphire. Color: Greenish Blue, Cut: Emerald, Weight: 0.89, Dimensions: 4.00 x 6.02mm. (Information supplied by photo contributor.) © Daniel Stair, CustomGemstones.com

Credit: Daniel Stair, CustomGemstones.com 2014