The diamond trade, one of the most secretive and informal business, is organized along this line:
Miner - he mines diamonds
Shop owner - he establish a licenced shop in the diamond mining area and supply various miners in exchange of diamonds they produce
Diamond dealer - he buys from many shop owners and/or miners
Diamond buyer - he visits the diamond producing regions and buys from local diamond dealers
Diamond trader - he is established in main diamond trading centers and buys from various diamond buyers, which he often finances.
Diamond cutter - he buys rough diamonds from diamond traders to cut them
Cut diamond wholesaler - he buys cut diamonds from diamond cutters and supplies local retailers or jewelry manufacturers
Jewelry maker/wholesaler - he makes or wholesales ready made jewelry
Cut diamond/jewelry retailer - he sales to final client.