Kevin are you able to do silver? I have no clue about the properties of the metal and whether or not it's feasible.
Just looked at latest trading prices, gold has exceeded the price of platinum
(since the Indian currency is more or less worthless when compared to any modern foreign standard like the Euro or USD; ie you can not convert Rupee to USD, but you can do it the other way around, my parents/relatives usually purchased gold ingot and deposited them safe boxes rather than investing in the Indian stock market)