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State, federal district, territory Mineral Rock or stone Gemstone Alabama [1]: Hematite (1967): Marble (1969): Star blue quartz (1990): Alaska [2] [3]: Gold (1968 ...
Main diamond producing countries. Diamond is a solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic.Diamond as a form of carbon is tasteless, odourless, strong, brittle solid, colourless in pure form, a poor conductor of electricity, and insoluble in water.
Soukoulis and his collaborators at Ames Lab/ISU in 1990 and 1994, suggested photonic crystal designs (lattice diamond [2] [3] and the woodpile structure, [4] respectively), which gave the largest omnidirectional photonic band gaps. Many experimental groups all over the world still use his woodpile structure to fabricate photonic crystals at ...
Most Ia diamonds are a mixture of IaA and IaB material; these diamonds belong to the Cape series, named after the diamond-rich region formerly known as Cape Province in South Africa, whose deposits are largely Type Ia. Type Ia diamonds often show sharp absorption bands with the main band at 415.5 nm (N3) and weaker lines at 478 nm (N2), 465 nm ...
Group of precious and semiprecious stones—both uncut and faceted—including (clockwise from top left) diamond, uncut synthetic sapphire, ruby, uncut emerald, and amethyst crystal cluster. A gemstone (also called a fine gem , jewel , precious stone , semiprecious stone , or simply gem ) is a piece of mineral crystal which, when cut or ...
Diamond is extremely strong owing to its crystal structure, known as diamond cubic, in which each carbon atom has four neighbors covalently bonded to it. Bulk cubic boron nitride (c-BN) is nearly as hard as diamond. Diamond reacts with some materials, such as steel, and c-BN wears less when cutting or abrading such material. [4]
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The Joseph "Diamond Jo" Reynolds Office Building and House is a historic building located in McGregor, Iowa, United States. Joseph "Diamond Joe" Reynolds was a New York native who started working in a gristmill in the 1840s. As the grain belt moved to the west, he moved with it, settling in Chicago in the 1850s and McGregor around 1860. [2 ...