Hallmarked Navajo micro-inlay bear pendant / pin turquoise, sterling

This vintage upbeat Bear micro-inlay is crafted to be either a pendant or a pin brooch. Hallmark of Sterling over T is well-known Navajo artists Mary Thomas and Richard T Thomas. Contains onyx, turquoise, spiny oyster, pearly shell, lapis, gold, etc. No flaws (some glare in photograph). The back loop for a chain or cord won’t accept the round extension-section loops that some chains add to provide length adjustment, nor any “fat” cord or heavy chain. I have found a suitable silver chain about 17”, that has “squared” edges and is strong, rather than flat or round. However I cannot find a marking and do not represent that it is sterling. If the buyer does not want the chain, then first bundle it and begin a conversation about price reduction.