Product | Spinel | Purple spinel from Tanzania, Africa. Spinel is a newly emerging noble gemstone. Although it has existed for centuries, spinel has always been mistaken for sapphire and ruby, which are of the corundum category. Since spinel likes to grow together with ruby and sapphire, in many well-known ruby and sapphire mines, almost all rubies are mined with spinel. Although the hardness of spinel is not as strong as corundum (corundum: Mohs hardness 9), it is also 8.5, which beats more than 90% of gemstones. It also has various colors like gem-grade corundum. However, this misunderstanding was not solved until the industrial revolution in the 19th century, when technology developed, and its chemical formula was studied to find that it was not sapphire. The aluminum oxide of corundum; the chemical formula of spinel is magnesium aluminum oxide, which is different but very similar. Clarity｜Flawless [This assessment is based on GIA's clarity standards for diamonds - this purple spinel has no visible flaws under a 10x magnifying glass] Quantity｜1.16 carats Shape｜9.2 x 5.3 mm・Freeform Reflector Step Cut by Daniel Stair Color｜Pale purple or slightly grayish purple with a pink tint