Peridots are among the rare gemstones that originate from deep within the earth's mantle, emerging to the surface through volcanic processes. This formation process is shared only with diamonds, making peridots quite unique.
The Spectrum of Peridot Hues
The color of peridots is invariably green, but this green varies extensively. It ranges from a light, yellow-tinged lime or grass green to rich, deep olive tones, and even to a darker, almost brownish army green.
Peridot's formation in the earth's mantle, as opposed to the crust, is not its only unique feature. It is also idiochromatic, unlike most gemstones which are allochromatic. This means the green color of peridot is inherent to its chemical structure, not a result of impurities as seen in many other gemstones.
Learn more about the colors of gemstones here
What Constitutes Peridot?
Peridots are essentially a type of Olivine, composed of two minerals: fayalite and forsterite. When olivine possesses the right color, size, and clarity, it is classified as 'peridot'.
Valuing Peridot
Peridot is known for being quite affordable. While factors like clarity, cut, and carat size do affect its price, the primary determinant of a peridot's value is its color.
The most sought-after peridots are those with a consistent, vibrant green color without any yellow or brown undertones.
Peridots from countries like Myanmar and Pakistan, known for producing stones of this ideal color, can command higher prices.
Optimal Carat Size
Peridots display their best color in stones weighing between 3 to 5 carats or more. Larger sizes allow for a richer color depth. However, due to their rarity, larger stones may cost more per carat.
Smaller peridots, under 2 carats but with excellent color and clarity, typically range from $30 to $60 per carat, while larger stones might reach up to $80 per carat.
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Treatment of Peridots
Peridots are generally not subjected to any enhancements other than standard cutting and polishing.
Peridot Sources
Today, the primary sources of peridot include China, Pakistan, Myanmar, Tanzania, and the USA.
Peridot in Jewelry
With a rating of 6.5 - 7 on the Mohs hardness scale, peridots are suitable for a variety of jewelry. However, for daily wear items or engagement rings, protective settings are recommended due to their relative softness.
Significance in Birthstones and Anniversaries
Peridot is one of the designated birthstones for August and is traditionally given as a gift for the 16th wedding anniversary.
