Pawn

DEAD PAWN
Dead pawn is an item that was pawned but was never collected by the original owner.
DEAD STONE ...

Some collectors invest in antique Navajo jewellery - made in the 1900's, these pieces are referred to as Dead Pawn or Old Pawn.

The earliest notation regarding this diamond occurs in January of 1589 when a flawless diamond weighing 37 or 38 carats is described in a document pledging it to Sieur de Sancy for him to pawn in Switzerland or Germany.

secondary market The secondhand market is considered anything that has been resold by an end user. Pawn shops and businesses established for the purpose of buying from the public or other pawn shops and secondhand buyers would be considered part ...

You can find cuff links in thrift shops, antique stores and malls, antique jewelry shows, flea markets, pawn shops, garage sales, swap meets, collectible shows, estate sales and auctions (both live and online).

Pawn shops and thrift stores are also great sources for inexpensive gemstone jewelry, especially simulants and synthetics. (Friends and relatives will probably be delighted to have you examine their pieces with your new-found expertise!) ...

So Jewelers really are your best bet. They do offer more than anyone else out there including the pawn shops.
But wait, there's more.
There are still other factors involved that can weigh heavily into the price you'll get for your stone.

See also: Jewel, Stone, Jewelry, Cut, Gemstones