Buy some natural gemstones and some personnel for a jewerly project

I am thinking to sell and make some pieces of jewelry in golden and silver with natural gemstones, for that reason I am searching for suppliers of diamonds, emeralds, rubies, sapphires, aquamarines, in all the shapes and sizes, and silver of 925 and golden of 18k. And We need to contact some personnel like designers 3d, jeweler, marketing and branding services, to create a new brand created exclusively for this project.