Choosing the perfect opal for your jewelry requires attention to detail, including color, pattern, and size. Opal stone exhibit a mesmerizing play-of-color, ranging from flashes of red, blue, and green to soft pastel hues. Black opals are considered the rarest and most valuable, while white and fire opals offer more affordable yet equally stunning options.  Website URL: https://www.cabochonsforsale.com/gemstone/opal