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无储备宝石
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Drills :超值产品
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Buy Lapidary Drills
These drill are ideal for lapidary work on opals or gemstones and genuine diamonds are impregnated into top of drill.
view our article on how to drill with these diamond drills.
http://www.opalauctions.com/docs/opal-information/how-to-drill-a-hole-in-opal
