Sapphire
The most well known of the sapphire family is the blue stone that is only second in hardness to diamonds and known as the gem of heaven because of its rich blue color. The use of sapphires as adornment dates back, as early as, the 7th century B.C. One of the most famous sapphires is the 104 ct. Stewart Sapphire mounted in the British Imperial State Crown. Sapphires are most prevalent in Australia, Thailand, Sri Lanka, China, Madagascar, Africa, and Montana in the United States.
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