This exquisite black opal brooch features a stunning 25.64 carat natural Black Opal displaying vibrant play-of-color in green, blue, and yellow hues. Accented with 14.75 carats of brilliant diamonds, the piece is masterfully crafted in K18 gold, with a total weight of 34.10 grams. Certified by GRS, the opal is confirmed as Australian origin with no indication of treatments, making this brooch a rare and highly collectible masterpiece of fine jewelry.