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Șard Formation
Sard is a dark reddish-brown variety of the mineral chalcedony, similar to carnelian. Sard may also refer to: * Sard's lemma, a result in mathematical analysis, named after mathematician Arthur Sard * Anything from, or related to the Mediterranean island of Sardinia **Sardinians, a people hailing from the aforementioned island ** Sardinian, a language spoken on Sardinia **Sardinian literature ** Sardinian music **Sardinian history **Sardinian (sheep) * Sardis, the capital city of the ancient kingdom of Lydia * Sard, Khuzestan, a village in Khuzestan Province, Iran * Sard, Lorestan, a village in Lorestan Province, Iran * Sard, a planet in the Gradius video game series Şard may refer to: *Şard ( hu, Sard), a village in Ighiu Commune, Alba County, Romania *Șoarș, a commune in Braşov County, Romania * Şardu, a village in Cluj County, Romania * Şapartoc, a village in Mureș County, Romania * Şardu Nirajului, a village in Mureș County, Romania * Şoard, a village in Mureș ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chalcedony
Chalcedony ( , or ) is a cryptocrystalline form of silica, composed of very fine intergrowths of quartz and moganite. These are both silica minerals, but they differ in that quartz has a trigonal crystal structure, while moganite is monoclinic. Chalcedony's standard chemical structure (based on the chemical structure of quartz) is SiO2 (silicon dioxide). Chalcedony has a waxy luster, and may be semitransparent or translucent. It can assume a wide range of colors, but those most commonly seen are white to gray, grayish-blue or a shade of brown ranging from pale to nearly black. The color of chalcedony sold commercially is often enhanced by dyeing or heating. The name ''chalcedony'' comes from the Latin ''chalcedonius'' (alternatively spelled ''calchedonius'') and is probably derived from the town of Chalcedon in Turkey. The name appears in Pliny the Elder's ''Naturalis Historia'' as a term for a translucent kind of jaspis. Another reference to a gem by the name of ''khalkedon'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
