3D Jewellery Modelling

Information for the business: Jewellery
Industry: Business
Design details: We are launching a 15-strong collection of jewellery consisting of simple bracelets, simple rings, and chains. Each jewellery item comes in a range of finishes - silver, rose gold, gold, polished black. Every piece of jewellery is made from sterling silver.

I need someone to 3D model this collection so that high quality images can be rendered from a range of angles for a variety of uses.

Each piece of jewellery is very basic, for example the bracelet is made from a single square silver wire that has been bent. The visual finishes however are required to look realistic and representative of the actual product. I expect the same level of quality as you would from other jewellery company's modelled jewellery.

Examples:
http://www.cartier.co.uk/collections/jewellery/collections/love/love-bracelets/b6035416-love-bracelet
http://www.cartier.co.uk/collections/jewellery/categories/rings/juste-un-clou-rings/b4094800-juste-un-clou-ring
Ideas for the visual style: Silver metal; white background
Extra notes: