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Ice crystal. A close-up of growing ice crystals displaying typical hexagonal symmetry. Ice crystals are solid ice in symmetrical shapes including hexagonal columns, hexagonal plates, and dendritic crystals. [1] Ice crystals are responsible for various atmospheric optic displays and cloud formations. [1] [2]
Danburite. Danburite is a calcium boron silicate mineral with a chemical formula of CaB 2 (SiO 4) 2. [5] It has a Mohs hardness of 7 to 7.5 and a specific gravity of 3.0. [5] The mineral has an orthorhombic crystal form. [5] It is usually colourless, like quartz, but can also be either pale yellow [5] or yellowish-brown.
the free encyclopedia that anyone can edit. "The Day Before the Revolution" is a science fiction short story by American writer Ursula K. Le Guin (pictured). First published in Galaxy in August 1974, it was republished in Le Guin's The Wind's Twelve Quarters (1975). Set in her fictional Hainish universe, the story has strong connections to her ...
The Trepča Mines ( Albanian: Miniera e Trepçës, Serbian: Рудник Трепча / Rudnik Trepča) is a large industrial complex in Kosovo, located 9 km (5.6 mi) northeast of Mitrovica. [1] The mine is located on the southern slopes of the Kopaonik mountain, between the peaks of Crni Vrh (1,364 m (4,475 ft)) and Majdan 1,268 m (4,160 ft ...
Dolomite ( / ˈdɒl.əˌmaɪt, ˈdoʊ.lə -/) is an anhydrous carbonate mineral composed of calcium magnesium carbonate, ideally CaMg (CO3)2. The term is also used for a sedimentary carbonate rock composed mostly of the mineral dolomite (see Dolomite (rock) ). An alternative name sometimes used for the dolomitic rock type is dolostone.
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Celestine (mineral) Celestine (the IMA -accepted name) [6] or celestite [1] [7] [a] is a mineral consisting of strontium sulfate ( Sr S O 4 ). The mineral is named for its occasional delicate blue color. Celestine and the carbonate mineral strontianite are the principal sources of the element strontium, commonly used in fireworks and in various ...
season 3. The third season of the American satirical superhero television series The Boys, the first series in the franchise based on the comic book series of the same name written by Garth Ennis and Darick Robertson, was developed for television by American writer and television producer Eric Kripke. The season is produced by Sony Pictures ...