A 2.70 carat round black Ethiopian opal with 0.10 carats of round lab-grown blue diamond and 0.12 carats of round white zircon in 18K yellow gold over sterling silver ring - the black Ethiopian opal ring where the dark body color of the stone allows its play-of-color to appear more dramatic. Black Ethiopian opal is distinguished from standard Ethiopian opal by its dark base color, which intensifies the spectral color display. Genuine lab-grown blue diamond accents add precious sparkle.