Hallmarking to become mandatory
Gold Hallmarking Survey
Originally Answered: What do hallmark, 916 and KDM jewellery mean ?
Hallmark- The Hallmark stamp ensures the purity of gold and diamond jewellery. The hallmark stamp is implied to 23KT, 22Kt, 21KT and 18 KT gold and diamond jewellery.
916- This stands for the finesse of gold jewellery - 22KT gold. It is a mixture of 91.6% gold per 100 gm and alloys. All the best possible designs in gold are made in 22KT as 24KT gold is too soft and malleable to make jewellery.
KDM Jewellery- KDM means cadmium mixed with gold to make jewellery. Cadmium began to be used in place of copper. The advantage being that unlike the traditional gold & copper solder, gold and cadmium can be mixed in a ratio of 92% + 8%. This ensured the finesse of jewel remains constant regardless of the amount of solder used. Such jewellery using cadmium began to be widely known as KDM jewellery. But it causes health issues for artisans, and so it is banned. more
Hallmark must be made by spirit, not interpretation of the standard / law.
I know of any number of jewelry manufacturers that produce 18 carat jewelry and put hallmark seal. It is cheating and day light robbery.
If you want good quality, buy from Tanishq or C. Krishnaiah Chetty.. See link:
It is impossible to check if 1 lakh gold chains are really 22 carat gold, everyday.. more