With a hardness of 6.5 to 7, peridot is reasonably hard and is used in all kinds of jewelry. Large clean stones are always sought by collectors. The name peridot is derived from the Greek word 'peridona', which means something like 'to give richness'.
Peridot is a gem that has been connected to superstition throughout the ages. Associated with the sun, peridot is believed to have the power to break evil spells and dispel the mysteries of the dark. During the Middle Ages, people wore peridot to gain foresight and divine inspiration. The Gem of the Sun was thought to dissolve enchantments. When pierced and worn around left arm, it drove away evil spirits. Peridot was held to cure liver disease and dropsy. And it ended night terrors and relieved the wearer of envy. Peridot, held under the tongue, lessened thirst during fever.