Aquaprase is a somewhat newer and rare stone.  Colorations range from aqua to crytal to light brown.  These have a a nice angular shape and hang from a thick sterling plank with a post back.  2 inches by 1 ince at widest.  Because Aquaprase is not an inherently heavy stone, even for their size, these errings do not hang heavy on the ear

Aquaprase Earrings