Distribution of natural pearls in the world
Natural pearls are the main growth in the temperate zone, the depth of 8-15 meters in the sea water. Seawater in the bacteria, air bubbles or gravel, and other substances into the tiny mother-of-pearl , touch on the mantle, the mother-of-pearl Tony has been stimulated and then Secreted out pearls of… Published: Friday 01 August, 2008
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