916 gold is nothing but 22 carat gold. 916 is basically used to denote the purity of gold in the final product, i.e. 91.6 grams of pure gold in 100 gram alloy. The figure 916 is basically 22/24 (22 carat by 24 carat). In a similar manner, 958 gold is 23 carats (23/24) and 750 gold is 18 carats (18/24).
HUID is a unique code that will be given to every piece of jewellery at the time of hallmarking, which will be helpful in identifying the jeweller or the Assaying and Hallmarking Centres (AHCs) which had hallmarked the jewellery.
