Ancient Tabular Agate with four raised eyes. 

Also called a "Double Infinity Agate" 

Ex Dr James Keats Collection

21 mm

Ancient Banded Agate Tiger Bead

Ex Dr James Keats Collection

39 mm x 26 mm

Ancient Rock Crystal Tiger Bead. Notice how
the tail curls over the top of the body.

Ex Dr James Keats Collection

35 mm x 18 mm