Peridot is the gem variety of olivine, a mineral formed under intense heat.
Perhaps named from the French word "peritot" meaning unclear, due to its inclusions and cloudy nature. Small crystals of peridot are often found in rocks by volcanoes and in meteors that fall to earth. Because the iron which creates the color is an integral part of its structure, its color is always green - ranging from transparent lime to olive green.
Peridot is recommended for insomnia, digestive problems and to stimulate the mind.
Some say peridot has the power to drive away evil spirits, intensified when the stone is set in gold. And it's also said to strengthen the power of any medicine drunk from peridot goblets.