Test of d coin. 1)When u put para (mercury), it stick to the coin. After few seconds it becomes liquid. 2) Wait for few minutes & clean d coin with cotton, tissue paper, cotton cloth. 3)After cleaning if u put Aluminum wire on d coin it started dusting in few seconds. If u remove d wire from coin it continuously goes dusting. Coin is Heatable(on Gas until it become RED) washable.(with Eno, lime, pitambari, tumaric) Free hand test available in Mumbai

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