close quartzite crystal |
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| navigate by keyword : abundant amethyst background black brown close collection crust crystal crystalline dioxide earths feldspar gem gemmology gemology gemstone geological geology german isolated its jewel jewelry little macro material mineral most natural nature object ore ornamental pebble piece precious purple quartz quartzite quarz red rock rough sample second semi semiprecious set shiny silicon sio2 small specimen stone structure surface texture transparent volume white yellow |
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| Quartz silicon dioxide, SiO2, from the German Quarz is the second most abundant mineral in the earth`s crust about 12% of its volume after feldspar. |
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