Sterling Silver Pendants

These are sterling silver pendants the I received when I was younger. The dolphin and unicorn are probably gifts for my parents when I was a teenager making them about 35 years old. That would mean they are most likely 100% sterling silver. The amethyst pendant I got from a store I worked at called The World of Science and that also is sterling silver. tithe pendant is a bit heavy so it probably is also 100% sterling because it is older.