IN ancient Egyptian days peridot was known as the "gem of the sun" as it was said to protect its wearer from terrors of the night and nightmares.Priests believed it harnessed the power of nature, and used goblets encrusted with it to commune with their nature gods.Some historians believe that Cleopatra's famed emerald collection may have actually been peridots. The Romans called the gem "evening emerald" because of its sparkling shades of green.It was said to be sacred to Pele, the Hawaiian volcano and fire goddess and that the gem was formed by Pele's tears. Among the many myths linked to this stone:"Wear a peridot or for thee, No conjugal fidelity, The August born without this stone, ‘Tis said, must live unloved alone."From a more positive outlook it is said to wear the gem improves the chances of turning dreams into reality, increases willpower and will make the wearer happy, optimistic and famous. It was also believed that the gemstone would dispel all kinds of jealousy, envy and evil.Most peridots are mined in Arizona in the U.S. Australia, Myanmar and China. The gemstone saw a revival in the 1990s when new deposits were discovered in Pakistan, producing some of the finest peridots ever found. Some of these "Kashmir peridots" measured more than 100 carats. According to the internet, in 2003 scientists made the amazing discovery of peridot on Mars.