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 Definition Rock or a piece of rock shaped, cut, or finished for a particular purpose, especially used in construction, paving, monuments, and jewellery. [d] [e]
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 Workgroup categories Earth Sciences and Architecture [Categories OK]
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Core Article

Hi Robert, "Stone" is listed under the Earth Sciences core articles. Wonna claim the point? I'm ready to OK it. --Nereo Preto 03:02, 20 October 2007 (CDT)

Yesh. I've got a bunch actually. --Robert W King 05:20, 20 October 2007 (CDT)


Granite is compressed quartz and other materials, it is not a stone itself, but is a combination of the stone. --Robert W King 08:48, 20 October 2007 (CDT)

??? er... Ok. Granite, in geology, is the name of a intrusive, igneous, acidic natural rock. E.g., "El Capitan" or the "Half Dome" at Yosemite or the "Monte Bianco / Mont Blanch" in the Alps are made of granite. But it is well possible that some engineered stone is commercially called "granite". This is a problem between rocks and building stones, so for example, commercially, "granite" includes all intrusive rocks from granites to gabbros, and some metamorphic rocks as migmatites and gneisses.
If there are engineered stones called granites it is correct to report the fact, but we must specify how they are different from natural granite. We should probably also make distinctions between granite as a rock, as a building stone (commercial term) and as engineered stone. The plot thickens... --Nereo Preto 08:57, 20 October 2007 (CDT)
Does my edit suffice? --Robert W King 09:02, 20 October 2007 (CDT)
Yes, this does it.
A very fancy solution would be to provide a table of equivalence between rocks, commercial names of natural stones, and engineered stones with the same name. The two terms I know are used with different meanings by geologists and stone dealers are "granite" and "marble" (which they generally use also for limestones). This requires of course some bibliographic research. But for engineered rocks I am totally helpless! --Nereo Preto 09:09, 20 October 2007 (CDT)


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