Purchase good quality zircon must have a clear and clean space I don't see flaws with the naked eye, in consideration of the proportion of cut. Zircon gem with a high light distribution. Cause a lot of spark at spark quantity should choose fresh granules with dark colored patches, tablets, do not select, or not full. Zircon is a medium strength can be welded to wear out on derivatives should be careful to wear care should be cleaned with a soft cloth to avoid impact shock severe.
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