Autumn Leaves - Alexandrite + London Blue Topaz Ring | La KaiserSize 7 We can't get enough of this colorful cluster of gemstones, made for adding that extra pop of color and sparkle to your everyday look. With alexandrite, simulated diamond, and two different topaz stones, this ring is the ultimate array of your favorite gemstones! Its asymmetrical design and unique combination of colors make it truly a unique statement. 18kt yellow gold vermeil bi color changing synthetic alexandrite natural London blue topaz