Monday, June 7, 2010

Peridot Gemstone




The peridot gemstone is an intriguing stone whose color ranges from a deep vivid green to a light yellow green, transparent and wonderfully reflective due to its many facets. It is the birthstone for August and is associated with the lively greens of summer.

The peridot is one of the oldest gemstones known. Recorded history reports it mined on St. Johns Island as early as 1500 B.C.E., and its use both as talisman and jewelry is recorded throughout Egyptian history. Cleopatra is said to have worn the peridot instead of emeralds, but really, who knows? What we do know is that the peridot is a strikingly beautiful gemstone that is well-suited for all styles and occasions.

Peridot is a gem-quality forsterite, a member of the Olivine group. Olivine is a mineral series that ranges in composition from forsterite (magnesium silicate) to fayalite (iron silicate). The name Olivine comes from the Latin oliva, in reference to the mineral's olive-green color. Olivine is the simplest of the dark minerals. It occurs in basalts and gabbros, igneous rocks rich in magnesium and low in quartz, and makes up the primary part of the mantle of the earth. It forms in the upper mantle in the magma, anywhere from 20 to 50 miles deep. Volcanic eruptions often blow out bombs of this material. Olivine is also contained in meteorites.

The peridot is not mined as most gemstones, close to the surface, but is found deep underground, like a diamond. It's hardness ranges between 6.5 and 7, so it is moderately hard but care should still be taken to wash the dust from the stone before polishing.

Peridot is one of the stones believed to have been inlaid in the breastplate of the high priest, Aaron, whose story is found in the book of Exodus. The stone has a history of mysticism, and was used as a talisman in ancient times. It was thought to promote strong relationships and ward off evil spirits. Pliny the Elder suggested that for the talisman to work, the stone should be worn on the right arm. If worn properly the peridot would help dreams come to fruition, attract the love of one's life, and enable one to sleep like a baby.

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Whether the peridot gemstone has magical powers or not, once it is set in jewelry it will look wonderful on you and those you love.