I think Gary said it best when he recently stated something to the effect, "learn your machine and hunt with as much sensitivity as possible". Small gold chains, thin gold hoop earrings, etc., they can be found with the Excal and the small coil whenever the conditions and circumstances are right, but not always. This same reality is also evident with some other machines like the CTX, Sov.,etc.,...."they'll read them when they can." I've found tiny gold chains with the Excal & 8" that I can't even get a response from with the same settings when attempting to air test them....have no idea why? But we're talking "small, thin chains" here as any good sized gold chain should present a response under normal hunting conditions. But honestly, these tiny small gold chains are near worthless and they're really not worth all the added concern as it would take several of them to equal the value of an average sized gold ring of the same k. To me they're just "bonus targets" that I no longer concern myself with. If I find one, that's great, but given the obvious difficulties in trying to get a response from them and the minimal amount of them out there.....just not sure they're really worth all the concern.