Green, Blue, Yellow Sapphire - 1.17 ct - International Gemological Institute (IGI) - No Treatment Color-Change

Sapphire is one of the most esteemed gemstones, famous primarily for its deep blue varieties, but it actually occurs in a broad spectrum of colors, including green, blue, and yellow. This particular sapphire exhibits a notable color-change phenomenon, shifting hues between green, blue, and yellow under different lighting conditions. Color-change sapphires belong to the corundum mineral family, characterized by their exceptional hardness of 9 on the Mohs scale, second only to diamond, making them ideal for jewelry worn daily. The stone weighs 1.17 carats and is certified by the International Gemological Institute (IGI) as untreated, meaning it has not been subjected to any color enhancement or heat treatment, which is significant since treatments are common in the sapphire trade to enhance appearance. Unheated sapphires with rare color-change effects are highly prized by collectors due to their natural beauty and rarity. Found mainly in locations like Sri Lanka, Madagascar, and Tanzania, these stones' unique optical properties are caused by trace elements in their crystal lattice, interacting with different light sources. This rare sapphire appeals to gem enthusiasts seeking exceptional natural gems and stands out as a remarkable example of nature's diversity in gemstone coloration.