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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 (/ 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.
The calcium/(calcium+magnesium+iron) ratio in diopside that formed with one of these other two pyroxenes is particularly sensitive to temperature above 900 °C, and compositions of diopside in peridotite xenoliths have been important in reconstructions of temperatures in the Earth's mantle. Chrome diopside ((Ca,Na,Mg,Fe,Cr) 2 (Si,Al) 2 O
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This List of shell ring sites includes archaeological sites with confirmed and possible shell rings. Shell rings have been reported from Colombia, Peru, Japan, and the southeastern United States. Some sites have two or more shell rings, including some with two more or less equal rings joined together, or a main ring with smaller rings attached ...
A man in Florida is looking for the owner of a ring found inside a black jewelry box with a note after Hurricanes Helene and Milton ravaged the coastal communities.