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Added on 15 November, 2007 InspirationSiO2....silicon dioxide is the chemical composition of all these stones. DescriptionWhen water-clear, quartz is known as rock crystal or mountain crystal. However, quartz can contain a number of different impurities, which create different color varieties. Purple quartz is known as amethyst; white is milky quartz; black is smoky quartz; pink is rose quartz, and yellow or orange is citrine. Inspiration Linkhttp://www.mii.org/Minerals/photoqtz... Used Linkhttp://www.moe.gov.sg/edumall/tl/dig ![]() ![]() |
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