Blue, Green Spinel - 5.17 ct - International Gemological Institute (IGI) - Cobalt

Spinel is a gemstone often admired for its brilliance and range of vivid colors, sometimes confused with other gems such as ruby. This particular spinel exhibits a unique combination of blue and green hues attributed to cobalt content, lending it a striking appearance. The stone's medium carat weight of 5.17 makes it a substantial specimen suitable for various types of fine jewelry. Spinel crystals are formed in metamorphic rocks and have a characteristic hardness that allows for attractive faceting while ensuring durability. The International Gemological Institute (IGI) certification provides reliable information on its authenticity and quality. Historically, spinel has been prized in royal collections and is increasingly appreciated by modern gem collectors for its rarity and vibrant colors.