What is a Star Sapphire Gemstone?

A Sapphire is a semi-precious gemstone, a Star Sapphire displays an optical phenomenon of nature called asterism under specific lighting and can be distinguished from any other form of Sapphire. This gemstone is cut and polished into a Star Sapphire with the right amount of tiny needle-like inclusions called rutile. 

When viewing a Star Sapphire, a six-rayed star appears floating across the surface of the stone, this is visible under direct light and whilst tilting and rotating the stone in different angles, visible to the human eye. It has no distinct cleavage and is a very hard stone, rating 9 on the Mohs scale, making it the second hardest material on earth, second only to diamond. At Rosendorff Diamonds, we have some spectacular and unique Star Sapphire rings and pendants. 

Star Sapphire Colours

Star Sapphires come in a range of colours from shades of blue and multiple tones of pink, orange, yellow, green, grey and black. Different tones of blue are the most desired colour range that looks exquisite again any colour metal and becomes a favourite jewellery piece.

Purple Star Sapphire and Diamond Pendant

Star Sapphire Clarity
The perfectly aligned needle-like rutile inclusions, these Star Sapphires have a silky luster when it is cut and polished. Most Sapphires are typically opaque or some exquisite specimens are slightly translucent.
Grey-Blue Star Sapphire and Diamond Ring

Star Sapphire Cut

Star Sapphires have uneven tops and bottoms as this is required for orientation to get the best display asterism. The Star Sapphire is cut out of cabochon, a gemstone, that has been shaped and polished, as opposed to faceted. The best cabochons are transparent to translucent, smooth dome-shaped with good symmetry.

Purple Star Sapphire Pendant with Diamond Halo









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