This beautiful Montana agate represents what I think of when I read about the Passenger Pigeon who's flocks were so dense they would block out the sun. They are now extinct and Martha was the last survivor of their species. She died in captivity. The sterling oxidized pendant is 2" x 3" and hangs from a 26" handmade adjustable chain in oxidized sterling. The herkimer diamond that hangs from the bottom is possibly five hundred million years old and represents the world before humankind.