Sapphires are one of the "precious" gemstones, and are the September birthstone.
A member of the corundum family, Sapphires are usually found in hues of blue, but can be found in other
colors as well. The most valuable Sapphires have a clear, deep-blue appearance. Some of the best
quality Sapphires are found in Myanmar, India and Sri Lanka. Sapphires from Australia, Thailand and
Nigeria are often a very dark blue, sometimes almost appearing black.
Color variations of Sapphire are due to differences of the titanium and iron content
within the particular gemstones. Pink Sapphires owe their color to very small amounts of
chromium. Yellow sapphires were once called "oriental topaz" and can be quite stunning in
appearance. Green Sapphires used to be called "oriental peridot up to about the 19th
Heat treatments from about 3100 to 3300 degrees Fahrenheit (1700 to 1800 degrees
Celsius) can change some cloudy specimens to a permanent bright blue color. The two gemstones above
were created in the laboratory, but show how beautiful these gemstones can appear in their very best
Color: Various tones of blue, pink, orange, green, yellow, purple, black and
Density: 3.95 to 4.03
Transparency: Transparent to