Tag: rare sapphire

A rare variety of natural sapphire, known as colour-change sapphire, exhibits different colours in a different light. Sapphire is a precious gemstone, a variety of the mineral corundum, consisting of aluminium-oxide with trace amounts of elements such as iron, titanium, chromium, copper, or magnesium. Sapphire deposits are found in Eastern Australia, Thailand, Sri Lanka, China, Vietnam, Madagascar, Greenland, East […]