Color Facts


The determining factors that give a gemstone its quality and value are made according to the rules of the "4 Cs": Color, Clarity, Cut, and Carat Weight.

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Peridot, the crystalline variety of the mineral Olivine, derives its vivid coloration from a combination of magnesium and iron. The Olivine group is one of the most common mineral types on the Earth’s surface, it is a magnesium/iron silicate in which the ratio of magnesium and iron vary between the two mineral extremities: Forsterite (Mg2SiO4) and Fayalite (Fe2SiO4). Peridot is the transparent gem variety of Forsterite-Olivine.

Peridot possesses a rich, glowing velvet luster, and exhibits colors that range from golden tsavorite lime greens to rich emerald grass greens, the latter of which command the highest prices. Peridot is an idiochromatic gem, which means that its color comes from the basic chemical composition of the mineral itself, and is an indispensable element in its make-up. Peridot is colored by ferrous iron that is basic to its composition; the best colors of Peridot generally contain about 10–15% of iron. This runs to the contrary of gems such as ruby or sapphire, which get their coloration from trace elements present as impurities.
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Peridot, being for the most part green, is not light dependent like red and blue gems and looks good under all light sources.


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