Soapstones

Soapstone (also known as steatite or soaprock) is a metamorphic rock, a talc-schist. It is largely composed of the mineral talc and is thus rich in magnesium. It is produced by dynamothermal metamorphism and metasomatism, which occurs in the areas where tectonic plates are subducted, changing rocks by heat and pressure, with influx of fluids, but without melting. It has been a medium for carving for thousands of years.

http://en.wikipedia.org/wiki/Soapstone


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Gallstones compose a solid formation of cholesterol and bile salts. However, research shows that approximately 80 to 90 percent of all Gallstones are cholesterol Gallstones which form when the liver begins secreting bile that is abnormally saturated with cholesterol. The excess cholesterol crystallizes and then forms stones which are stored in the gallbladder or the cystic duct. Gallstones can also form due to low levels of bile acids and bile lecithin.

http://womenshealth.about.com/cs/gallbladder/a/gallstonessymtr.htm
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