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Sapphire is a precious gemstone, a variety of the mineral corundum, consisting of aluminium oxide ( α- Al 2 O 3) with trace amounts of elements such as iron, titanium, cobalt, lead, chromium, vanadium, magnesium, boron, and silicon.
SAPPHIRE is a global supplier of AMD Radeon based graphics and mainboard products for gaming, eSports, performance and professional markets. It also offers GPU Compute server systems for blockchain and cryptocurrency mining.
Learn about sapphire, a corundum variety that comes in various colors and has a rich history and lore. Find out how to identify, evaluate, and appreciate sapphire with GIA's comprehensive guide, photos, videos, and research articles.
Learn about the different colors, qualities, and prices of sapphire, the September birthstone and a member of the corundum family. Find out how to identify and grade sapphires, and see examples of Kashmir, blue, pink, and other fancy sapphires.
- Colors of Sapphire. Sapphire is generally known as a blue gemstone but surprisingly it comes in a wide range of colors and quality variations. In general, the more intense and uniform the color is, the more valuable the stone.
- Sapphire Clarity. Blue sapphires typically have some inclusions, but they generally have better clarity than rubies. Blue sapphires with extremely high clarity are rare, and very valuable.
- Star Sapphire. Star sapphires and star rubies belong to the phenomenal corundum category. The star effect is called asterism. It’s caused by reflections from tiny, needle-like inclusions that are oriented in several specific directions.
- Sapphire Cut. Oval shapes with triangular and kite-shaped facets on the gem's crown (top portion) and parallel rectangular facets on the gem's pavilion (bottom portion) are very common for corundum of all colors.
Learn everything about sapphires, from their mineral composition and origin to their symbolism and value. Explore the different colors, shapes, cuts, and treatments of natural and lab-grown sapphires, and find out how to choose the perfect one for you.
Learn about the properties, varieties, and uses of Sapphire, the most precious and valuable blue gemstone. See pictures of different colors and forms of Sapphire, such as Star Sapphire, Padparadschah, and Color Changing Sapphire.
