PARA 4.4.11
An Advance Licence may be granted for the duty free import of:
(a)
Gold of fineness not less than 0.995 and mountings, sockets, frames and
findings of 8 carats and above;
(b)
Silver of fineness not less than 0.995 and mountings, sockets, frames
and findings containing more than 50% silver by weight;
(c)
Platinum of fineness not less than 0.900, mountings, sockets, frames
and findings containing more than 50% platinum by weight.