Jewel of the day: Marc Alary Stacking Rings
Designer Marc Alary is best known for pieces incorporating animals or plant life; here he moves on to simple but still fun enameled stacking rings.
So far they seem to be available only in combinations of black and white, but these provide a nice graphic pop and are less sugary sweet than some all diamond bands.
They tend to run about USD$1400-ish and up; here a shot showing how a grouping looks together.
You can find them at Twist Online, among other retailers.