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China stone

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China stone is a medium grained, feldspar-rich partially decomposed granite characterized by the absence of iron-bearing minerals. Its mineral content includes quartz, feldspar and mica; accessory minerals include kaolinite and fluorspar. It is found in one area of Cornwall in the United Kingdom and is the UK’s only indigenous source of feldspathic material currently being commercially extracted. Production levels in the four years up to 2003 averaged 2,800 tonnes per year. Cornwall Stone Chemistry % CaO 2.00 K2O 4.00 P2O5 0.50 Na2O 3.50 TiO2 0.10 Al2O3 16.50 SiO2 73.00 Fe2O3 0.15 Volatiles % LOI 1.50

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China stone is a medium grained, feldspar-rich partially decomposed granite characterized by the absence of iron-bearing minerals. Its mineral content includes quartz, feldspar and mica; accessory minerals include kaolinite and fluorspar. It is found in one area of Cornwall in the United Kingdom and is the UK’s only indigenous source of feldspathic material currently being commercially extracted. Production levels in the four years up to 2003 averaged 2,800 tonnes per year. Other names include Cornish or Cornwall stone. It is sometimes confused with petunse, which although somewhat similar, is a different rock. Cornwall Stone Chemistry % CaO 2.00 K2O 4.00 P2O5 0.50 Na2O 3.50 TiO2 0.10 Al2O3 16.50 SiO2 73.00 Fe2O3 0.15 Volatiles % LOI 1.50 * CAS Number: 12168-80-8 Conocida también como: Pegmatite. Graven. Gowen. Manx stone. Meldon stone. Growan. Petunste. Amakusa.