The name derives from the Greek, but the meaning is uncertain. Perhaps it refers to the numerous crystal planes of the crystal. The name “chrysolite” (Greek – gold stone) was formerly applied not only to peridot but also to many similarly colored stones. The name commonly used in mineralogy is olivin ( because of its olive green color).

Details:

It has a vitreous and greasy luster, and is not resistant to sulphuric acid. It tends to burst under great stress, therefor is sometimes metal-foiled. Dark stone scan be lightened by burning. Rarities are peridot cat’s eye and star peridot.
The most important deposits are in Red Sea on the volcanic island of St. John, they have been mined for 3500 years. Beautiful crystals can be found on the walls of cavities of weathering peridot rock. Good material can also be obtained from serpentine.
Peridot was brought to Europe by the crusaders in the Middle Ages and was often used for ecclesiastical purposes. It was very popular during the baroque period. It is not greatly desired by the trade because of its lower hardness. Used in table and emerald cuts, sometimes as brilliant. Usually set in gold.
The largest cut peridot weighs 310ct and was found on the island of St John.

*Info by Walter Schumann “Gemstones of the World”