Thank you for your information for our company. We are professional jewelry manufacturer, For custom design jewelry manufacturing, the material we can use are solid sterling silver, brass, copper and alloy according to customer's request. Minimum order quantity: No limit for stock items, that means you can buy small quantity per design at wholesale price but no less than US$200 for mixed designs. For custom design, we request minimum quantity 30 to 300 pieces per design according to ...