Sapphire

This is a very cool bi-color sapphire that also has a color shift from a lemon yellow/blue in daylight to a golden yellow/purple under incandescent light. It also shows some green due to the mixing of the colors on the blue end. Note the dimensions on this one. Like a marquise, this stone faces up to be a large size for what it weighs. This stone also has a nice separation of colors where the blue crosses the stone on one tip with in a fairly straight, but soft line. Color: Yellow-Blue Bi-Color, Cut: Step Cut Diamond Shape, Weight: 0.64, Dimensions: 4.5 x 7.4 mm. (Information supplied by photo contributor.) © Daniel Stair, CustomGemstones.com

Credit: Daniel Stair, CustomGemstones.com 2014