主要经营以：银，铜，合金，天然淡水珍珠等为原材料。
Main management by: the silver, the copper, the Alloy, the Natural pearls and so on are raw materials.
淡水珍珠天然生然几可能是有点黑点，迎接定货。
The fresh water pearl lives however how many are naturally a little the spot, welcome to order.
本文用显微拉曼对三种珍珠(天然海水珍珠、人工养殖海水珍珠、人工养殖淡水珍珠)做了测试与分析。
Three kinds of pearl natural seawater pearl, farmed seawater pearl, and farmed fresh water pearl have been tested by the confocal micro Raman spectrometer.
珍珠类：天然珍珠、养殖珍珠、天然海珠、海水珍珠、淡水珍珠、南洋珍珠、黑珍珠；
Pearl categories: natural pearls, cultured pearls, natural sea beads, sea pearls, freshwater pearls, South Sea pearls, black pearls;
珍珠类：天然珍珠、养殖珍珠、天然海珠、海水珍珠、淡水珍珠、南洋珍珠、黑珍珠；
Pearl categories: natural pearls, cultured pearls, natural sea beads, sea pearls, freshwater pearls, South Sea pearls, black pearls;
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