Natural Sapphires
The sapphire is one of the three gem-varieties of corundum, the other two being ruby – defined as corundum in a shade of red—and padparadscha—a pinkish orange variety. Although blue is their most well-known color, sapphires may also be colorless, and are found in many colors including shades of gray and black.
The cost of natural sapphires varies depending on their color, clarity, size, cut, and overall quality – as well as their geographic origin. Significant sapphire deposits are found in Eastern Australia, Thailand, Sri Lanka, China (Shandong), Madagascar, East Africa, and in North America in a few locations, mostly in Montana. Sapphire and rubies are often found together in the same area, but one gem is usually more abundant.
Read more about this topic: Sapphire
Famous quotes containing the word natural:
“Some natural tears they dropped, but wiped them soon;
The world was all before them, where to choose
Their place of rest, and Providence their guide;
They, hand in hand, with wandering steps and slow
Through Eden took their solitary way.”
—John Milton (1608–1674)