Purchasing a genuine diamond or gemstone – not a “faux” or “simulated” stone – on eBay can be a scary prospect. Unlike going to a jeweler, you can’t examine it in person and assess how it looks on your ring finger before you shell out your hard-earned cash. There’s the very real risk that you’re not going to get what you paid for.
But these concerns can be addressed by being a smart eBay shopper. After all, when you buy on eBay, the savings can be huge and you can find really unique jewelry items!
Before bidding on any diamond or precious gem (such as emerald, ruby or sapphire), make sure you understand how value is determined for that particular stone. There’s no excuse for not being an educated shopper. If eBay sellers don’t address these characteristics in their auction listings, click on the “Ask seller a question” link and get answers before you bid!
For diamonds, that means evaluating the four Cs: clarity, color, carat and cut.
Clarity is the term used to describe the size and number of inclusions (minute traces of non-crystallized carbon) in a diamond. Most are invisible to the naked eye; the larger and more numerous the inclusions are, the less valuable the diamond.
Diamond color grades start at D and go up through the alphabet. Truly colorless stones, graded D, are extremely rare and very valuable. The closer a diamond is to being colorless, the rarer and more valuable it is and the more it will shine.
Carat is how the weight of a diamond is measured. The larger the diamond (the rarer) the more expensive per carat it will be. Carat refers to weight, not size or diameter, although diamonds of identical weight can look larger or smaller depending on the cut.
The cut of a diamond determines how it refracts and reflects the light; a well-cut diamond will seem brighter and properly cut.
To find the best diamond that fits within your price range it essentially comes down to a compromise between the 4Cs and your consideration of which factors are most important to you.
There is a “fifth” C, or Certificate. A certificate diamond has a “report card” that grades the four traits mentioned above, including listing specific items about that particular diamond that 鑽石 are unique to it. A certificate goes a long way towards establishing the trustworthiness of an online diamond seller.
Gemstones such as rubies, emeralds, and sapphires usually undergo treatments to enhance color and fill cracks. The jewelry industry considers treatment of these three gemstones standard practice. Such treatments include oil and resin treatments; heat treatment, and chemical or “diffusion treatment.”
Most eBay sellers will provide details about any treatment applied to their gemstones. If they don’t, request the details before bidding on the item.