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Yellow Sapphire

yellow-sapphire
Transparent yellow sapphire in mixed cut

Up until the end of the 19th century yellow sapphire was known as oriental topaz (only blue corundum was called sapphire). Nevertheless yellow and greenish yellow sapphires make unusual and attractive gemstones in their own right.

In Queensland and New South Wales (Australia), a greenish yellow sapphire is found that may be faceted. Similar stones occurs in Thailand, and purely yellow stones in Sri Lanka, Montana (USA), and East Africa.

Chemical Composition : Aluminium oxide
Crystal System / Forms :

Trigonal


Cuts & Uses :

Brilliant, Mixed.


Hardness : 9
Lustre : Vitreous
Refractive Index / Birefringence :

1.76-1.77 / 0.008


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