Star Sapphire

Star Sapphire will have a blue hue commonly, and part of the corundum family with an exception of white asterism visible. Mined from several locality like from Sri Lanka, Madagascar, Myanmar, and Vietnam. These gemstones are also referred to as six ray’s gemstones in the trade also known as the "Star on Earth"

Star Sapphire

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The key feature that distinguishes a star sapphire from any other forms of sapphire is the asterism that gives the stone its name. Due to its hardness and durability, this gemstone is practically unmistakable, although there are several other gems that have been known to occur with similar luster and color. The most mistaken gemstones are Star Garnet and Star Diopside.

Gemstone Attributes

Mineral Corrundum
Chemistry Al2O3
Color Light - Deep Blue
Refractive Index 1.762 - 1.770
Birefringence 0.008 - 0.010
Specific Gravity 4.00
Mohs Hardness 9.0

STAR Sapphire Value

Star sapphire are commonly opaque, although there are some specimens which exhibit some translucency, but this are very fine specimens. The asterism is created by a perfectly aligned needle-like rutile inclusions. They become a vitreous to silky luster with the right cut and polish.

Star Sapphire Sources

There are many star sapphire deposits around the world, in locations such as Africa and Brazil, but the most important deposits today are in Australia, Myanmar, Sri Lanka and Thailand.

Star Sapphire Properties 

Blue Sapphire Stone or Corundum is the next hardest gemstones at 9.0 in Mohs Hardness after Diamond which has a 10.0 making sapphires very durable for everyday use.

Star Sapphire Colors 

Star Sapphires are the same famous blue gemstones as regular sapphires. They can also be found in pink, yellow, orange, green, lavender and black. Iron and titanium make blue stones while vanadium creates violets to purple colored stones. Yellow and green hues and tones are created by a small amount of iron and pink-reddish tones are created by chromium.

Blue is the most desired color, and the more vivid and intense, the more desired it becomes. Star sapphires from Thailand are famed for showing a golden star instead of the more common white. When the pink color gets intense and has traces of chromium and iron these corundum are no longer sapphire and they become star ruby.

Star Sapphire Care

The hardness of Sapphires stones is second only to diamonds amongst natural gemstones. It also has no cleavage planes. Because of this, it is an excellent stone for jewelry.