Well, as the jewelry OEM/ODM supplier for years, we will give you some suggestion base on products side of view.
First of all, you will need to think about what kind of products you want to carry, like what is your styles, wild, charming or some other styles…
Then after you decide what kind of styles you would like to carry, you will need to decide what kind of quality level you will take, as products looks same but with difference materials used, like for metal part, you can choose iron, zinc alloy, brass, sterling silver, gold…different materials with different quality and your cost will be different, you will need to think about it.
Also for fashion jewelry, anti-tarnish will be very very important thing, some will last years, some may last only several days…
check with us if you need any help on products side.