See also an opposite side view of this gem grade peridot specimen. Forsterite is the magnesium rich member with a pure formula of mg 2 sio 4. Peridot has an olive or bottle green colour due to the presence of iron and a distinctive oily or greasy lustre. The transparent green stone is a variety of the mineral olivine a silicate found in many igneous rocks and a major constituent of the earth s upper mantle. It has a high birefringence so doubling of the back facets can easily be seen in larger specimens when viewed from the front.
Fayalite is the iron rich member with a pure formula of fe 2 sio 4. Olivine s formula is written as mg fe 2 sio 4 to show the substitution of the. Peridot pronounced pair a doe is the gem variety of olivine. Peridot pronounced pair a doe or precious olivine is a volcanic gemstone that was once treasured by native hawaiians as the tears of the goddess of fire pele. Gem quality specimens of the mineral olivine are called peridot by gemmologists.
This peridot rough specimen is a crystal section with mostly broken surfaces and a blocky shape. Your on line link direct to the peridot mines and gemstone faceting shops for natural peridot gemstones mined at several locations around the world including peridot gems from the san carlos indian reservation in arizona and burmese peridot gemstones. Olivine which is actually not an official mineral is composed of two minerals. Buy now and receive 10 off your first purchase. This peridot rough specimen is a crystal section with mostly broken surfaces and a blocky shape.
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Buy now and receive 10 off your first purchase. Fayalite is the iron rich member with a pure formula of fe 2 sio 4. See also an opposite side view of this gem grade peridot specimen.
