wholesale gold filled jewelry vendors
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wholesale gold filled jewelry vendors
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Tmark's independent encoding contains 4 "T". The appearance is like the shape of the octopus of diamond, located in the center of the table. The mark uses unique technology, which has no damage to diamonds and needs to be viewed under 150 times the electronic optical appreciation mirror. TMARK's mark is only five nanometers, which is equivalent to 1/2000 of the thickness of the person's fingerprint, which can perfectly present the fire color and brightness of the diamond.