One can become a successful stock trader or broker by completing a college or university program geared to stocks and bond trading with honours and working hard by learning through experience with a successful investment firm.
One inserts oneself into the diamond industry through networking. It will be a good idea to master some skill related to trading diamonds, so that you are an appealing candidate for an opportunity...
Becoming a stock broker is a tough and demanding field, most importantly you will need a good college education involving lots of math. You will need to gain plenty of experience in a brokerage firm....