I succumbed to the Royal hooplah and broke down and bought myself this ring.  What a surprise!  The faux sapphire sparkles and emits a crystalline spectrum of blue, green and turquoise when held out in sunlight. The surrounding "diamonds" shimmer like a halo around it. It has become one of my favorite costume pieces.  I also use it as an emergency flare so when I get lost in a crowd, I just raise my hand and poof! I'm found!