45mm AB round shaped prism with a star shape facets in the center, 2 inches over 1/2 inch thick. With a silver coating on the back to create the Aurora Borealis effect on the front. Round with rows and rows of diamond shaped cuts that create a star shape in the center. I think this may be my most showy faceted prism, there are so many facets it is impossible to get a picture that does it justice. This is a gorgeous hard to find prism. You don't need the sun to get beautiful light effects from this prism. There is a hole at the top to hang it by. Your prism will come gift boxed with a bow as pictured. Beads and hanging filament included.