Let’s start with education. Many entry level positions simply require a high school diploma or GED. If you want to be with a more reputable company they may require a degree in fine art and jewelry making/design.
It is more traditional to have on the job training in this field. That being said, it may be more strategic to pull in sales training from sales experts. This way gems are left to the jewelry experts and sales are left with the sales experts and when combined, you will have a higher level of training compared to other jewelers.