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Tibetan silver: silver on the historical
definition is about 30% of an alloy, but the Tibetan silver on the
market today, almost no silver. Only white copper alloy crafts.
Copper-nickel alloy is a zinc alloy, also known as the ancient
Chinese foreign silver. Tibetan silver purity is not high, so the
impurities are more black is deliberately general jewelry left
behind in the processing. Main ingredient is kelp, etc., if do not
want to use toothpaste wash.