Peridot is the modern August birthstone and the gem designated for the 16th wedding anniversary. See other August birth stones: Traditional, Contemporary, Mystical, Ancient, Zodiac and Star signs.
Peridot (pronounced pair-a-dot) is a transparent yellowish-green Magnesium/Iron Silicate. It is a gem variety of rings the mineral Chrysolite or Olivine and its chemical formula is given by: (Mg,Fe)2SiO4.
Peridot ranges in color from light yellow-green to the intense bright green of new spring grass to olive. Because of the way peridot splits and bends the rays of light passing through it, it has a velvety appearance, a rich glow, and a slightly greasy luster. The purer green a peridot is the higher the value. Any tinges of brown or visible flaws greatly diminish the price.
See peridot jewelry.
The best-colored peridot has an iron percentage of less than 15% and includes nickel and chromium as trace elements.
It is not clear whether the word peridot comes from the Arabic word faridat, which means gem or if it is derived from the French word peritot which means unclear. The French were the first to call this yellow-green stone peridot in the 18th century. Before then, peridot was known as topaz. Peridot has been mined as a gemstone for an estimated four thousand years and is mentioned in the Bible under the Hebrew name of pitdah. It was used by the Egyptians as early as 1500 BC and was considered the gem of the sun.
Early miners looked for peridot at night because they believed that light from the moon made the crystals easier to find. After marking the locations of the crystals they came back in the daylight to dig them up.
Gem quality peridot comes from Zagbargad Island in the Red Sea, Myanmar (formerly known as Burma), Australia, Brazil, Germany, Mexico, Pakistan, and Arizona and Hawaii in the USA.
The best quality peridot has historically come either from Myanmar or Egypt but in 1994 a new deposit of peridot was discovered in Pakistan which produces some of the finest stones. This mine is located in the Nanga Parbat region in the far west of the Himalayan Mountains in the Pakistani part of Kashmir. Large crystals have been found in this area, one stone was more than 300 carats.
Most of the world production of peridot comes from Arizona where there is an abundant source of lessor quality material while peridot from Myanmar, Pakistan and Egypt is more rare and finer quality. Price for stones from these areas will be higher and similar to prices for other top quality colored gems.
Personalized Couples Jewelry Promise Rings for Her from Zales Hairstyles black hair braids
Vedere Anche: Impostazioni: Un clic.