PERIDOT   Peridot is the child of volcanic action. Crystals are sometimes combed from the black sands of Hawaii. Peridot is usually a lively lime green, although it can also have a brownish or olive cast. Peridot is an accepted birthstone for August. It is also the accepted anniversary gemstone for the 16th year of marriage. Peridots were favored by pirates, considered powerful amulets against evil, and when set in gold, were said to protect the wearer from the terrors of the night. They had medicinal uses, too. If fashioned into a chalice from which medicines were drunk, it intensified the effects of the drug. Care should be taken to protect it from scratches, sharp blows, household chemicals and extreme temperature changes. Do not use a home ultrasonic machine for cleaning. The peridot is abundant, and is available in larger sizes. It is found in Burma, the U.S. and Egypt.   Jewelers of America Back to Gemstone List