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Gemstone irradiation is a process in which a gemstone is exposed to artificial radiation in order to enhance its optical properties.High levels of ionizing radiation can change the atomic structure of the gemstone's crystal lattice, which in turn alters the optical properties within it. [1]
Optical properties of common minerals Name Crystal system Indicatrix Optical sign Birefringence Color in plain polars Anorthite: Triclinic: Biaxial (-) 0.013
Leaders of states in the U.S. which have significant mineral deposits often create a state mineral, rock, stone or gemstone to promote interest in their natural resources, history, tourism, etc.
Minerals are distinguished by various chemical and physical properties. Differences in chemical composition and crystal structure distinguish the various species. Within a mineral species there may be variation in physical properties or minor amounts of impurities that are recognized by mineralogists or wider society as a mineral variety.
Cacoxenite is an iron aluminium phosphate mineral [5] with formula: Fe 3+ 24 Al(PO 4) 17 O 6 (OH) 12 ·17(H 2 O). [4] Cacoxenite is associated with iron ores. [6] The name comes from the Greek κăκός for "bad" or "evil" and ξένος for "guest" because the phosphorus content of cacoxenite lessens the quality of iron smelted from ore containing it.
“Hot Ones” is going solo. BuzzFeed announced a deal to sell First We Feast, the studio behind the popular YouTube chicken-wing-eating celebrity talk show “Hot Ones,” for $82.5 million in ...
Latitude and longitude coordinates are provided for many National Register properties and districts; these locations may be seen together in a map. [1] There are 29 properties and districts listed on the National Register in the county, including 1 National Historic Landmark. Another five properties were once listed, but have since been removed.
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