Details
Set of 22 actual stones, beautifully-presented in a case with a clear lid, so that your customer can decide which size stone would best suite their ring / budget.
This is a good way of getting your customer excited about their purchase, answering their most basic question: what size do I get for my money and what does that size look like? We, in the trade, know how big a 1/4 carat or 1/2 carat diamond is, but most people have no idea, and taking a random selection from your display will merely confuse them.
If you consider this a bit "over-the-top" for the standard of diamond jewellery you sell, there's a really made of aluminium shapes.