Platinum: £23 per gram
In 1976, the Recording Industry Association of America introduced the platinum certification for records that sold more than one million units.
However, at £23,144.63 per kg, or just over £23 per gram, platinum is currently less valuable than gold.
#4 & #7... Not sure what I am missing here.. But it seems that if I grind my solid gold bars up into a fine powder I can increase it's value by 700%.. from $28 to $200 a gram??