High Grade Blue Sapphire (Bankok) - 3 To 12 Carat, Natural Sapphire, 100 Grams, Phenomenon Of Asterism With Six-ray Star Pattern

Owing to our rich experience and vast industrial knowledge, we have been able to make, export, distribute and supply a range of highly qualitative range of High Grade Blue Spphire (Bankok) in Delhi, India. The sapphire belongs to the corundum family, an aluminium oxide and conferred being one of the finest mineral found in the world. It is remarkably hard, the second hardest substance on earth after diamond.Blue
The word "sapphire" derives from Latin sapphirus, sappirus from Greek Some linguists believe that it derives from Sanskrit, Shanipriya meaning, "dear to Saturn". It is acknowledged to be the birthstone for September.
Corundum may show a phenomenon called asterism, or the star effect which usually appears as a six-ray star pattern across a cabochon-cut stonea s curved surface and it arises from white light reflecting from numerous tiny, oriented needle-like inclusions.

Sapphire Treatments

Sapphires are treated by several methods to enhance and improve their clarity and color. Most common is by heating the sapphires in furnaces to temperatures between 500 and 1,800 A C (932 and 3,272 A F) for several hours, or by heating in a nitrogen-deficient atmosphere oven for seven days or more. This causes the stone to become more blue in color, but some of the rutile inclusions are lost at the same time.