Found in lava, meteorites, and deep in the earth’s mantle, yellow-green peridot is the extreme gem

ABOUT PERIDOT

Gem-quality specimens of the mineral olivine are called peridot by gemmologists. Peridot has an olive- or bottle-green colour due to the presence of iron, and a distinctive oily or greasy lustre. It has a high birefringence, so doubling of the back facets can easily be seen in larger specimens when viewed from the front. Good- quality crystals are very rare.

OCCURRENCE

Peridot is found on St. John’s Island(Egypt), in China, Burma, Brazil, Hawaii and Arizona(USA), Australia, South Africa, and Norway.

Fun Facts

Some peridot is ancient: it’s found in pallasite meteorites, remnants of our solar system’s birth.
In 2005, peridot was found in comet dust brought back from the Stardust robotic space probe.
Gem variety of the mineral olivine: found in peridotite rock from the earth’s upper mantle.
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Crystal Structure Orthorhombic
Composition Magnesium Silicate
Colour Yellowish green
Luster Vitreous to greasy
Refractive Index 1.64 to 1.69
Specific Gravity 3.34
Mohs Hardness 6.5
DR 0.036