Can I do a small batch custom order (50-100 pieces)?
Most factories want 500+. Are there makers who do small runs?
For the US market you need: FTC 'made in' labeling, metal purity stamps (925, 14k), and if children's jewelry, CPSIA lead/cadmium testing. For gold over a certain weight there are marking requirements. Most factories handle this if asked. Budget 200-500 dollars for lab tests.
I started with a 100-piece run of silver studs for 12 dollars a piece. Sold out in 3 months on Etsy. The sample cost me 80 dollars and they refunded it on the bulk order. Start small, prove sales, then scale.