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Amethyst, Princess of Gemworld (Amy Winston) is a superhero published in American comic books created by DC Comics. Created by writers Dan Mishkin , Gary Cohn and artist Ernie Colón , she debuted in The Legion of Superheroes #298 in April 1983.
At microscopic scales, precious opal is composed of silica spheres some 150–300 nm (5.9 × 10 −6 –1.18 × 10 −5 in) in diameter in a hexagonal or cubic close-packed lattice. It was shown by J. V. Sanders in the mid-1960s [ 8 ] [ 9 ] that these ordered silica spheres produce the internal colors by causing the interference and diffraction ...
An amethyst geode that formed when large crystals grew in open spaces inside the rock. The largest amethyst geode found as of 2007 was the Empress of Uruguay, found in Artigas, Uruguay in 2007. It stands at a height of 3.27 meters, lies open along its length, and weighs 2.5 tons. Amethyst is also found and mined in South Korea. [19]
Ametrine, also known as trystine, golden amethyst, or by the trade name bolivianite, is a variety of quartz with alternating zones of purple and yellow-orange coloration. Its name is a portmanteau of amethyst and citrine. While ametrine is commonly referred to as a combination of these two quartz varieties, some sources claim this is not ...
Laccaria amethystina, commonly known as the amethyst deceiver, or amethyst laccaria, [1] is a small brightly colored mushroom. Because its bright amethyst coloration fades with age and weathering, it becomes difficult to identify, hence the common name "deceiver".
The Greek name amethystos alludes to the popular belief that amethyst prevented intoxication; as such, drinking vessels were made of amethyst for festivities, and carousers wore amulets made of it to counteract the action of wine. [6] The amethyst is a brilliant transparent stone of a purple color and varies in shade from violet purple to rose.
Amethyst loses its natural violet color when heated to above 200-300°C and turns a color that resembles natural citrine, but is often more brownish. [45] Unlike natural citrine, the color of heat-treated amethyst comes from trace amounts of the iron oxide minerals hematite and goethite .
Diamond (Mohs 10) is 1500 (off scale). Diamond was the hardest known naturally occurring mineral when the scale was designed, and defines the top of the scale, arbitrarily set at 10. The hardness of a material is measured against the scale by finding the hardest material that the given material can scratch, or the softest material that can ...