South African satellite sea urchin shell set in 14ky and sterling with jasper, peridot, and rhodolite garnet.  Bead strand can be removed and the piece can be worn as a pin.  4.5"h by 3"w by .5"d.

turban shell from the Indian Ocean set in 14ky gold and sterling silver, set with an Australian boulder opal, blue topaz, and freshwater pearls.  3 1/4" h by 2 1/4" w.  

tibia shell from the western Pacific Ocean set in 14ky gold and sterling silver, with russian simbircite and citrine.  On a mixed strand of freshwater pearls and smoky quartz, which can be removed and the piece can be worn as a pin or aslide as well.  3"h by 2.5"w by .5"d.