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2. Granite - Wikipedia

   en.wikipedia.org/wiki/Granite

   Granite (/ ˈ ɡ r æ n ɪ t / GRAN-it) is a coarse-grained intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies underground. It is common in the continental crust of Earth, where it is found in igneous ...

3. S-type granite - Wikipedia

   en.wikipedia.org/wiki/S-type_granite

   Like all granites, the modal mineralogy of S-type granites are dominated by alkali - and plagioclase feldspars and quartz. Thus, S-type granites are silica over-saturated (contain quartz), and do not contain feldspathoids. An interesting feature of S-type granites, at the hand sample scale, is that alkali-feldspars are typically white in color ...

4. Color index (geology) - Wikipedia

   en.wikipedia.org/wiki/Color_index_(geology)

   Color index (geology) Gneiss, displaying characteristic darker (melanocratic) and lighter (leucocratic) bands. Color index, as a geological term, is a measure of the ratio between generally dark mafic minerals and generally light felsic minerals in an igneous rock. [1][2] The color index of an igneous rock is the volume percentage of mafic ...

5. Decomposed granite - Wikipedia

   en.wikipedia.org/wiki/Decomposed_granite

   Decomposed granite, as a crushed stone form, is used as a pavement building material. It is used on driveways, garden walkways, bocce courts and pétanque terrains, and urban, regional, and national park walkways and heavy-use paths. DG can be installed and compacted to meet handicapped accessibility specifications and criteria, such as the ADA ...

6. Quartz Vs. Granite: Which Stone Is Right For Your ... - AOL

   www.aol.com/quartz-vs-granite-stone-countertops...

   Quartz countertops are composed of crushed quartz crystals, resins, and more pigments. An increasingly popular choice for kitchens, quartz countertops are designed to be durable and resistant to ...

7. I-type granite - Wikipedia

   en.wikipedia.org/wiki/I-type_Granite

   Color index, or the modal abundance of minerals other than quartz, plagioclase and alkali feldspar (e.g., mafic silicates, oxides, sulfides, phosphates, etc.), can be used to infer the maturity of a granite. Juvenile I-type granites have a higher color index. Amphibole, biotite, sphene, allanite, and oxides are typically more abundant. In ...