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Peridot (/ ˈ p ɛ r ɪ ˌ d ɒ t,-ˌ d oʊ / PERR-ih-dot, -doh), sometimes called chrysolite, is a yellow-green transparent variety of olivine. Peridot is one of the few gemstones that occur in only one color. Peridot can be found in mafic and ultramafic rocks occurring in lava and peridotite xenoliths of the mantle.
Worry stones. Worry stones are smooth, polished gemstones, usually in the shape of an oval with a thumb-sized indentation, used for relaxation or anxiety relief. Worry stones are typically around 3 centimetres (1 in) in size. They are used by holding the stone between the index finger and thumb and gently moving one's thumb back and forth ...
Peridotite is named for the gemstone peridot, a glassy green gem originally mined on St. John's Island in the Red Sea [65] and now mined on the San Carlos Apache Indian Reservation in Arizona. [ 66 ] Peridotite that has been hydrated at low temperatures is the protolith for serpentinite , which may include chrysotile asbestos (a form of ...
Peridot, a gem-quality olivine; Archaically, any of several green or yellow-green-coloured gemstones including Topaz, a silicate mineral of aluminium and fluorine; Chrysoberyl, an aluminate of beryllium; Zircon, a mineral belonging to the group of nesosilicates; Prehnite, an inosilicate of calcium and aluminium
Chrysoprase, chrysophrase or chrysoprasus is a gemstone variety of chalcedony (a cryptocrystalline form of silica) that contains small quantities of nickel. Its color is normally apple-green, but varies from turquoise-like cyan to deep green. The darker varieties of chrysoprase are also referred to as prase.
It is a pallasite, a type of stony–iron meteorite that when cut and polished shows yellowish olivine (peridot) crystals. In 1951 a farmer uncovered a meteorite in an unknown location near Esquel while digging a hole for a water tank. The meteorite was purchased from the finders and taken to the United States in 1992 by meteorite expert Robert ...
Kyiv and Washington are both interested in U.S. access to Ukraine's undersoil riches, but President Volodymyr Zelenskiy has said any such deal must involve concrete security guarantees. "We hope ...
It consists of centimetre-sized olivine crystals of peridot quality in an iron-nickel matrix. Coarser metal areas develop Widmanstätten patterns upon etching. Minor constituents are schreibersite , troilite , chromite, pyroxenes, and phosphates ( whitlockite , stanfieldite, farringtonite, and merrillite ).
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