...but this one does seem to recognize and correctly represent newer cloisonne beads - here's a quote from one of her descriptions:

"For sale today we have a pair of beautiful vintage Chinese Cloissone beads from the 1980's or earlier. OK, so she mis-spelled cloisonne. It happens.

Can 80-year-old gold-plated beads look the same as 30-year-old beads, if they've been stored unused in warm dry conditions? Seems unlikely to me, although finer silver seems to take a good while longer than sterling to blacken - less copper to interact with atmospheric sulphur?