I hope you know 24c gold can't be worn? 24c gold is very flexible and can be deformed with bare hands. Gold that you receive are generally 22c.
I feel this will fail miserably. Because most people in india like to pay in cash for their gold jewellery. And flipkart won't take cash above 50k and that too in few locations. Those locations might already have a store in the city which will be better option for buyers.
