Buy this lab-certified 0.03 carat oval black Ethiopian opal cabochon, measuring 13 x 10 x 4 mm, which displays a stunning spectrum of colors. This gemstone has been meticulously hand-cut and polished to the highest quality. Known for its beauty, unique spiritual properties, and captivating play of colors, the black Ethiopian opal is truly a special gemstone. This loose gemstone is said to ward off negative energy and enhance physical and mental clarity. It also makes a perfect gift for a woman.