Nata Heng Schluessel, GG logo Roland Schluessel, FGA

Peridot

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On our way to the Bernard-myo Peridot deposit in Myanmar. Burmese gem workers searching for Peridot bearing pockets and veins.

161915
1817

WHAT IS A GEM PERIDOT?

APPEARANCE:

Peridot is an attractive green gemstone which is mainly found in Myanmar ( Burma), northeast of Mogok and in Pakistan. Smaller stones are also found in Arizona, USA.

The key in judging the quality of Peridot is the degree of brownness and yellowness in its color and the degree of imperfections in the stone. The most desirable is a sparkly and clean stone with a pure green color.

A high quality of the cut is important to display the full beauty of color and potential of brilliance.

Pleochroism = weak and noticeable only in dark stones.
Transparency = Transparent.
Brilliancy = Medium to high (may be covered by a strong color saturation).
Phenomena = Asterism; Star Peridot is extremely rare.

PHYSICAL PROPERTIES: 27

Hardness = 6 ½ to 7.
Toughness = fair to good.
Cleavage = Poorly developed and not seen in gemstones.
Refractive Index = 1.654 – 1.690 (+/- 0.020)
Specific Gravity = 3.34 (+ 0.14, - 0.07)

CLEANING METHODS:

Ultrasonic and Steamer = Do not put a Peridot into the ultrasonic cleaner and never use a steamer.
Warm soapy water = Safe.
Advise for bench jewelers: Avoid acids and never put Peridot in a pickling solution.

STABILITY:

Reaction to heat = Rapid heat and temperature changes may cause fracturing or complete breakage.

ENHANCEMENTS:

None.

IMITATIONS:

Glass, composite stones (e.g. doublets and triplets), synthetic Spinel triplet and other resembling gemstones with lower value.

 

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