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3881 gem certification products are offered for sale by suppliers on Alibaba.com, of which loose gemstones accounts for 41%, loose diamonds accounts for 6%, and fashion jewelry necklaces accounts for 1%. A wide variety of gem certification options are available to you, such as brilliant cut, round brilliant cut and triangle.You can also choose from coated paper, art paper and kraft paper gem certification,as well as from duplex board, fancy paper, and corrugated board gem certification,And whether gem certification is synthetic moissanite, {2}, or {3}.