Star Sapphire is the most special type of Sapphire.
Star sapphires 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. Stars are usually made up of 2, 3, or 6 intersecting bands, resulting in 4, 6, or (rarely) 12 rays.
Ideally, Star Sapphire must be perfectly centered when viewed from just above, with each ray of the same length. The rays must be bright, sharp and clear - not blurry or blurry - and must reach from the crown of the cabochon to the bottom without interference.
Sapphire Star appears in almost every color seen in transparent sapphires, although yellow, orange, and green star sapphires are very rare. The optical phenomenon responsible for the shimmering rays of star sapphires is called asterism, from the Latin word astrum, for "star." Asterism is caused by frail inclusion like a small needle. The star of the black sapphire owes their star and its dark color includes shiny hematite mineral crystals. Clarity (clarity) in star sapphires is a complicated problem. The ideal Sapphire star will be completely transparent, but the rutile silk that causes the star phenomenon ensures that each Sapphire Star to a certain degree is included. A good Sapphire Star definitely has enough silk for bright and well-defined stars, without sacrificing stone transparency. The best semi transparent transparent stone. Color saturation decreases as opacity increases, so while opaque dragon stars may have very bright and well-defined stars, the colors can be dull and unattractive.
Ideally, Star Sapphire must be perfectly centered when viewed from just above, with each ray of the same length. The rays must be bright, sharp and clear - not blurry or blurry - and must reach from the crown of the cabochon to the bottom without interference.
Sapphire Star appears in almost every color seen in transparent sapphires, although yellow, orange, and green star sapphires are very rare. The optical phenomenon responsible for the shimmering rays of star sapphires is called asterism, from the Latin word astrum, for "star." Asterism is caused by frail inclusion like a small needle. The star of the black sapphire owes their star and its dark color includes shiny hematite mineral crystals. Clarity (clarity) in star sapphires is a complicated problem. The ideal Sapphire star will be completely transparent, but the rutile silk that causes the star phenomenon ensures that each Sapphire Star to a certain degree is included. A good Sapphire Star definitely has enough silk for bright and well-defined stars, without sacrificing stone transparency. The best semi transparent transparent stone. Color saturation decreases as opacity increases, so while opaque dragon stars may have very bright and well-defined stars, the colors can be dull and unattractive.
The right cuts are very important for Sapphire Star, not only for their overall appearance, but also to ensure the stars are well defined and correct. But beware, if you find a "perfect" star that is truly perfect - many artificial Sapphire Stars are on the market and this is one of their distinctive signs.
While most Sapphire Stars remain untreated, they may be treated to improve their color or to artificially induce star phenomena. Sapphire Star can be heated to intensify its color, but this must be done at low temperatures and very carefully, so as not to eliminate the rutile silk that stimulates the star. Because crude transparent prices have increased in recent times, most star sapphires are subjected to extreme heat and are sold as transparent stones. For this reason, fine Sapphire Star is increasingly rare and hard to find.
Sapphire Star is found dominant in Sri Lanka, but also a good blue Sapphire Star is from Burma. Black Sapphire Star is found in Cambodia and India.
While most Sapphire Stars remain untreated, they may be treated to improve their color or to artificially induce star phenomena. Sapphire Star can be heated to intensify its color, but this must be done at low temperatures and very carefully, so as not to eliminate the rutile silk that stimulates the star. Because crude transparent prices have increased in recent times, most star sapphires are subjected to extreme heat and are sold as transparent stones. For this reason, fine Sapphire Star is increasingly rare and hard to find.
Sapphire Star is found dominant in Sri Lanka, but also a good blue Sapphire Star is from Burma. Black Sapphire Star is found in Cambodia and India.
