Generally, peridot is thought of as a fairly clean gem. While the GIA lists it as a Type II colored gem [usually slightly included], market abundance and low prices dictate that eye-clean peridot is readily available.

The slightly "oily" or "sleepy" frequently seen in larger peridots is a result of strong double refraction that duplicates and blurs the images of the back facet junctions. This effect is not counted as a clarity issue.

Shape & Cut

Due to the lack of any prevalent crystal shape types recovered from the mines, peridot is most frequently cut as oval in accordance to market demands. However, all other cuts are common, as well as experimental and innovative fantasy cuts that take advantage of relatively inexpensive and good value gem rough.

As always, gems should always exhibit good symmetry and polish conditions; facets should be aligned straight in relation to the gem's girdle, and also to each other; polish conditions should be good with no visible surface pits or polishing lines.

Classical Sources Of Peridot

Peridot is found in several places around the world, but interestingly not in nearly as many locales as diamonds or sapphire, technically making it rarer! Burma and Pakistan are regarded as the sources of choice and are noted for quality crystals in the most desirable colors. Other locations include the U.S. and China The famed peridot-producing island of Zabargad off Egyptian Red Sea coast has now been abandoned.

The Use Of Heat, Treatments & Synthetics

Peridot is generally not enhanced.