Peridot is a gem-quality magnesium-rich mineral, olivine denoted by the formula (MgFe)2 SIO4. Olivine is not scientifically classified by the IMA as an individual mineral species, but is rather recognized as a mineral group with the Forsterite and Fayalite end members. Fayalite is the iron rich member with a pure formula of Fe 2 SiO 4. Der Peridot wird häufig auch als Chrysolith oder Olivin bezeichnet, wenn er Edelstein-Qualität hat.Charakteristisch ist vor allem die außergewöhnlich klare gelbgrüne Farbe, die an frisches Gras im Frühling erinnert.Der Name Olivin deutet auf die Ähnlichkeit zur Farbe von Oliven hin und wurde erstmals 1790 vom Mineralogen A. G. Werner benutzt. Fayalite . Peridot, also known as Chrysolite, is a variety of Olivine. Peridotite. Olivine, which is actually not an official mineral, is composed of two minerals: fayalite and forsterite. This lovely yellow-green gemstone can be found in the most unlikely places. Topaz, chrysoberyl, prehnite, and peridot (olivine) are all considered distinct gem species. Peridot Associations. It is a iron magnesium silicate. Olivines (those from Earth, not from outer space) form in the Earth’s mantle. Emerald stones and Peridot stones are two of them. Peridot is a 16th Anniversary gemstone. The hue of the green depends on how much iron content is in the crystal structure. Peridotite, an igneous rock made primarily of olivine and pyroxene, makes up most of the upper mantle. Chakras - Solar Plexus Chakra, Heart Chakra Birthstone - August Zodiac - Gemini, Leo, Virgo, Scorpio, Sagittarius Planet - Mercury Element - Earth Vibration - Numbers 5, 6 and 7 Typical colours - Olive green, bottle green, yellowish-green . Peridot vs. Emerald. Peridot is a well-known and ancient gemstone, with jewelry pieces dating all the way back to the Pharaohs in Egypt. Forsterite is the magnesium rich member with a pure formula of Mg 2 SiO 4. The colors range from a bright limey yellowish green to a deep luscious leaf green of the stones from the High Himalayas of Pakinstan. Peridot (/ ˈ p ɛr ɪ d ɒ t / or / ˈ p ɛr ɪ d oʊ /) (sometimes called chrysolite) is gem-quality olivine and a silicate mineral with the formula of (Mg, Fe) 2 SiO 4.As peridot is a magnesium-rich variety of olivine (), the formula approaches Mg 2 SiO 4.Its green color is dependent on the iron contents within the structure of the gem. Fayalite and Forsterite create a solid solution series , and most specimens identified as Olivine fall somewhere in between this series, almost always leaning more towards Forsterite with a greater content of magnesium. Peridot (pronounced pair-a-doe) is the gem variety of olivine. Peridot History. The gem variety of the mineral Olivine, it makes a lovely light green to olive-green gemstone.The intensity of color depends on the amount of iron present in a Peridot's chemical structure; the more iron it contains the deeper green it will be. Peridot is the gem variety of the mineral Olivine. In the vivid and eclectic world of gemstones, very few stones occur in single color. Rich in iron and magnesium, Peridot gemstones are often found in basalts. It is a very undervalued gemstone at the moment.