Ah! Now we know what it is!

a CHITON, a mollusk It’s truly beautiful A jeweller wrapped a gold wire around it to make a pendant Could be sewn to a velvet ribbon or attached to a leather string or silk string Hey as the new owner, the choice is yours One of a kind, the colours are amazing It measures about 1.5 inches I have no idea of the gold wire as I know it has never tarnished Preloved from the 60's Pretty old and still beautiful and rare This could be unisex