Petrified Fossilized Bones with Crystals

2 with Crystals inside appear to be parts of a leg bone with a crystalized joint/socket. It measures 3-1/2" x 2-5/8" x 1-3/4 and weighs 6.18 oz. The smaller one is 3-1/2" x 1-5/8" x 3/4 and weighs 4.23 oz. The 3rd looks like part of a knee joint or socket.

It measures 3-1/4" x 2-5/8" x 1-5/8 and weighs a hefty 11.83 oz. Thank you for your interest.