Large Natural Australian Boulder Opal - Vibrant Neon Green & Blue Play-of-Color - Queensland Offered is a substantial and highly attractive specimen of natural Boulder Opal, sourced from the famous fields of Queensland, Australia. This piece features a thick, genuine layer of precious opal seamlessly bonded to its natural ironstone matrix. ​The opal displays an intense and lively "play-of-color," dominated by electric neon greens and deep oceanic blues. Depending on the angle of light, flashes of turquoise and subtle hints of warm tones emerge across the undulating surface of the stone. ​The ironstone matrix provides a beautiful, dark contrast that makes the opal's colors appear even more saturated. This is a "hand-sized" specimen, significantly larger than the small fragments typically found, making it an excellent centerpiece for any high-end mineral collection or a unique investment piece for lapidary work. ​Type: Natural Boulder Opal ​Origin: Queensland, Australia ​Treatment: None (100% Natural) ​Luster: Vitreous/Waxy ​Condition: Excellent raw/semi-polished state