My first post! This thread is a great resource for anyone who loves jewelry or is thinking about making a future jewelry purchase.
Having been an executor of a family member's estate, I know how difficult it is to dispose of personal property, and specifically, to sell jewelry on the resale market or at auction. It was an education to say the least; and it changed my perspective about what I personally own.
Worth it: Certain 'luxury' watches (i.e.: Cartier, Rolex); any luxury designer piece (Van Cleef, Bulgari, Tiffany); 18K gold; large diamonds; antique jewelry.
Not worth it: everything else.
I hate to say it, but when I tried to sell lovely diamond, gemstone, and 14K gold pieces, no one was interested. In many cases, I was left with selling them for their weight in gold, or turning to eBay or other online auction sites and hoping for the best. Tiffany silver pieces have a decent resale value on eBay, but not with liquidators and pawn shops. Watches will never bring close to retail, but certain makers/models maintain their value (Cartier over Concord for example, even though the Concord watch has diamonds & 18K gold, and the Cartier did not.)
Liquidating an estate made me turn a critical eye towards what I have in my jewelry box. I sold or gave away mostly everything. I am now left with a handful of antique and designer pieces that I love and believe will transcend future fads and trends. The best advice I can give is to buy what you love if you see yourself wearing it forever. But if you are motivated by current fads and trends, then buy designer pieces b/c at least you can get some money back when you try to sell it after the trend fades.