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2. Roselite - Wikipedia

   en.wikipedia.org/wiki/Roselite

   Roselite. Roselite is a rare arsenate mineral with chemical formula: Ca2(Co,Mg) [AsO4]2·H2O. It was first described in 1825 for an occurrence in the Rappold mines of Schneeberg, Saxony, Germany and named by Armand Lévy after German mineralogist Gustav Rose. [ 2] It occurs in cobalt -bearing hydrothermal environments and was associated with ...

3. Rose quartz - Wikipedia

   en.wikipedia.org/?title=Rose_quartz&redirect=no

   From a subtopic: This is a redirect from a subtopic of the target article.. If the redirected subtopic could potentially have its own article in the future, then also tag the redirect with {{R with possibilities}} and {{R printworthy}}.

4. Quartz - Wikipedia

   en.wikipedia.org/wiki/Quartz

   Quartz. Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO 4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO 2. Quartz is, therefore, classified structurally as a framework silicate mineral ...

5. Desert rose (crystal) - Wikipedia

   en.wikipedia.org/wiki/Desert_rose_(crystal)

   A desert rose is an intricate rose -like formation of crystal clusters of gypsum or baryte, which include abundant sand grains. [1] The "petals" are crystals flattened on the c axis, fanning open in radiating clusters. The rosette crystal habit tends to occur when the crystals form in arid sandy conditions, [1] such as the evaporation of a ...

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7. Soft-paste porcelain - Wikipedia

   en.wikipedia.org/wiki/Soft-paste_porcelain

   Soft-paste porcelain (sometimes simply " soft paste ", or " artificial porcelain ") is a type of ceramic material in pottery, usually accepted as a type of porcelain. It is weaker than "true" hard-paste porcelain, and does not require either its high firing temperatures or special mineral ingredients. There are many types, using a range of ...