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Search Results - Gemstones, gemstones, August 2006
your search of 'Gemstones, gemstones, August 2006' has 1 result.
15/09/2009
Coral is a stone of organic origin, composed almost wholly of calcium
carbonate with about three per cent magnesium carbonate and possibly a
trace of iron oxide. It is generally expressed as being the axial
skeleton of coral polyps.
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