Sapphire is generally known as a blue gemstone but surprisingly it comes in a wide range of colors and quality variations. Red corundum is known as ruby and all other colored corundum (including colorless, or white sapphire as it is known in the trade) is sapphire, although blue is the most well-known. A durable stone that’s designated as a birthstone for September, it captures jewelry buyers with its practicality and aura of romance.Ĭorundum is the mineral species that includes both sapphire and ruby as varieties. Sapphire is one of the Big three of jewelry colored gemstones-the other two are ruby and emerald. This sapphire from Kashmir has an intense velvety blue color.
Synthetic gems have the same chemical, optical, and physical properties of their natural counterparts, but are a more cost-effective alternative to a natural gem.Comprehensive CAD/CAM For Jewelry Certificate The molten powder repeatedly falls from the flame onto a rotating pedestal, creating a synthetic crystal, called a boule, which can later be faceted into a gemstone. Powdered chemicals (the building blocks of the gem) are dropped through a high-temperature flame. The flame fusion process for creating gems, also called the Verneuil process, is the most affordable and common synthesis method for producing corundum (ruby and sapphire) and spinel.
When two or more intersecting bands appear, a star pattern is formed. Light that strikes the inclusions within the gem reflects off of the inclusions, creating a narrow band of light. Synthetic star sapphire exhibits the optical phenomenon called asterism, a star-like pattern created on the surface of a gemstone when light encounters parallel fibrous, or needle-like, inclusions within its crystal structure.
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