Sapphires – Rough to Polished Gem
Image Credit: John Bradshaw
Parti coloured sapphires – Parti coloured sapphires can display two or more hues within gemstone and Australia is the most significant source of Parti coloured sapphires.
Colour change sapphires – Colour change sapphires display differing colours subject to lighting conditions. In daylight, colour change sapphires are blue in colour and purple under incandescent light and sources include Tanzania.
Star sapphire – Star sapphires exhibit an optical property called asterism which is caused by the inclusion of rutile needles which intersect within the crystal structure and can create the appearance of a six ray, eight ray or twelve ray star pattern. The ideal shape to maximise asterism will be en cabochon.
Natural Sapphire & Sapphire Treatments
Image credit: Natural Sapphire Company