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How many times is the best magnifying glass to identify antique jade or jewelry jade?
A standard 10 magnification magnifying glass will do. . . .

In the national standards, there are clear standards for the classification of some jewelry, jade and antiques, all of which are "under a magnifying glass of ten times ..."

If other multiples are used, it is not conducive to referring to the national standard classification and is not accurate in valuation reference. . .

See the national standard or diamond grading standard for details.