Black Rutilated Quartz, Australian Opal + Moonstone Gemstone EarringsNorthern California designer Robindira Unsworth's penchant for natural beauty dazzles with this duo of light and dark contrasts. Treasured for its visually striking inclusions a kaleidoscope of colors, strands and patterns "trapped" inside its borders unlike diamonds, it's absolutely more the merrier for Rutilated Quartz. Known as the "fire of the desert" in indigenous Australian folklore, opals were thought to come from rainbows touching the earth.