AUGUST BIRTHSTONE
July 29, 2024

Peridot is a translucent, yellowish-green form of olivine that is also occasionally referred to as Chrysolite. One of the rare gemstones which comes in only one color is peridot. https://amzn.to/3zZFpGZ

Because of its vivid green color, peridot is sometimes referred to as the “gem of the sun.” It is an enthralling gemstone that has been treasured for generations. This magnificent gemstone has a fascinating mythology, a long history, and a wide range of distinct chemical and physical characteristics.

The history of peridot begins more than 3,500 years ago, when it was found for the first time on the Red Sea volcanic island of Zabargad. Peridot was especially beloved by the ancient Egyptians, who thought it was the gemstone of the sun deity Ra. The fascinating green color of peridot, which seemed even more vivid at twilight, earned it the nickname “evening emerald”. Ancient Roman noblewomen and high-ranking officials wore peridot jewelry as a sign of riches and prosperity.

Peridot was said to be able to ward off bad spirits and nightmares in folklore. It was also believed to have therapeutic qualities that would enhance vigor and health. Due to its beauty and metaphysical qualities, peridot has long been prized as a gemstone. It has also been linked to abundance, love, and protection. https://amzn.to/3zZFpGZ

Peridot is found in peridotite xenoliths of the mantle, which lava brings to the surface, and in mafic ultramafic and rocks. Rocks low in silica, including paleolithic meteorites and volcanic basalt, are home to the gem. One of just two gems known to have originated in the upper mantle’s molten rock rather than the crust of the Earth is peridot. Because of its vulnerability to weathering on its journey from deep insiPeridots can be distinguished according on their size and makeup. Lithium, nickel, and zinc concentrations in peridots generated by volcanic activity are often higher than those in meteorites. https://amzn.to/3YmYeO9

de the mantle to the surface, gem-quality peridot is uncommon on Earth’s surface.The chemical formula for peridot is (Mg, Fe)2SiO4. https://amzn.to/3YlS0yj

One of the rare gemstones that comes in just one hue—an olive-green—is peridot. However, the amount of iron present in the crystal structure determines the green’s strength and tint, therefore individual peridot gems can range in color from yellow to olive to brownish-green. Rarely, peridot may have a pure green tone with a medium-dark tone that lacks a brown mask or secondary yellow color. Reduced iron concentrations are the cause of lighter-colored gemstones.

While olivine is a common mineral, gem-quality peridot is rather uncommon on Earth because of its surface chemical instability. Olivine is typically found in minute grains and is generally extensively worn, making it unsuitable for use as a decorative material. Because large crystals of forsterite, the kind most frequently used to cut peridot stones, are uncommon, peridot is valued highly. https://amzn.to/3SpMsyU

Peridot mining, known as topazios in antiquity, started on St. John’s Island in the Red Sea in 300 B.C. These days, the San Carlos Apache Indian Reservation in Arizona is the main supplier of peridot olivine. The US also mines it at another location in Arizona; in Australia, Brazil, China, Egypt, Kenya, Mexico, Myanmar (Burma), Norway, Pakistan, Saudi Arabia, South Africa, Sri Lanka, and Tanzania; and in Arkansas, Hawaii, Nevada, and New Mexico at Kilbourne Hole.

A specimen weighing 310 carats (62 grams) and housed at the Smithsonian Museum in Washington, D.C. is the largest cut peridot olivine.