Vintage 80s Avon Hallmark bow green stone dot middle gold tone

This is a vintage Avon hallmark 1980s era .. a very cute lovely “bow” pendant with a green dot stone (?) in the middle .. the clasp has a mark but I don’t know what it is Chain measures approximately 7:5 inches drop .. 15 inches long end to end . Pendant is approximately.6 of an inch .. gold tone Beautiful condition