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Blue Star Sapphire, 5.59ct

Mined in Sri Lanka | Certified by GRS

Listing ID: 8801347

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Gemstone Natural Blue Star Sapphire
Origin Ceylon (Sri Lanka)
Carat Weight 5.59 Carats
Dimensions (L x W x H) 8.98 x 8.87 x 6.32 mm
Shape Round
Cutting Style Cabochon
Color Royal Blue
Clarity Milky-Transparent
Star Sharpness Very Clearly Visible 6-Ray Star (Super Sharp)
Treatments Not Heated, Treated or Enhanced
Certified By GRS
Special Remarks GRS certificate states the color as "vivid blue - GRS type royal blue"
Stone ID R13421
Listing ID: 8801347

About Star Sapphires

Star sapphires are a variety of sapphires which display the optical effect called Asterism. When cut as a cabochon, it displays a six-rayed star on the surface which moves with the movement of the stone.

Star sapphires are most commonly seen in blue and black colored sapphires, although they can be present in almost any shade.

It has a Mohs Hardness of 9 on a scale of 10, which makes it very suitable for daily wear. The Refractive index of sapphire ranges from 1.762-1.778.

Star sapphires with a royal blue/cornflower blue color displaying a sharp star are very rare to find. Such stones are an excellent choice for engagement rings since they represent uniqueness and are one-of-a-kind. Blue star sapphires are primarily found in Burma, Sri Lanka, Australia, and Madagascar.

Another notable color is black star sapphire with a golden star. These stones are generally found in India and Thailand.

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