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2. Moissanite - Wikipedia

   en.wikipedia.org/wiki/Moissanite

   The mineral moissanite was discovered by Henri Moissan while examining rock samples from what is now called Meteor Crater located near Canyon Diablo, Arizona, in 1893.At first, he mistakenly identified the crystals as diamonds, but in 1904 he identified the crystals as silicon carbide.

3. Silicon carbide - Wikipedia

   en.wikipedia.org/wiki/Silicon_carbide

   As a gemstone used in jewelry, silicon carbide is called "synthetic moissanite" or just "moissanite" after the mineral name. Moissanite is similar to diamond in several important respects: it is transparent and hard (9–9.5 on the Mohs scale, compared to 10 for diamond), with a refractive index between 2.65 and 2.69 (compared to 2.42 for diamond).

4. List of meteorite minerals - Wikipedia

   en.wikipedia.org/wiki/List_of_meteorite_minerals

   [citation needed] This is a list of those minerals, excluding minerals also commonly found in terrestrial rocks. As of 1997 there were approximately 295 mineral species which have been identified in meteorites. [1]

5. Peridot - Wikipedia

   en.wikipedia.org/wiki/Peridot

   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.

6. Rock (geology) - Wikipedia

   en.wikipedia.org/wiki/Rock_(geology)

   Metamorphic rocks are formed by subjecting any rock type—sedimentary rock, igneous rock or another older metamorphic rock—to different temperature and pressure conditions than those in which the original rock was formed. This process is called metamorphism, meaning to "change in form". The result is a profound change in physical properties ...

7. Marcasite - Wikipedia

   en.wikipedia.org/wiki/Marcasite

   The mineral marcasite, sometimes called "white iron pyrite", is iron sulfide (FeS 2) with orthorhombic crystal structure. It is physically and crystallographically distinct from pyrite, which is iron sulfide with cubic crystal structure. Both structures contain the disulfide S 2 2− ion, having a short bonding distance between the sulfur atoms.

8. U.S. Elections - Latest News and Updates on ... - AOL

   www.aol.com/politics/elections

   Get the latest updates on the U.S. Elections. Stay informed with fast facts, candidate updates, and key takeaways on the issues, all in one place.

9. Diamond - Wikipedia

   en.wikipedia.org/wiki/Diamond

   Host rocks in a mantle keel include harzburgite and lherzolite, two type of peridotite. The most dominant rock type in the upper mantle, peridotite is an igneous rock consisting mostly of the minerals olivine and pyroxene; it is low in silica and high in magnesium. However, diamonds in peridotite rarely survive the trip to the surface. [68]