This 111.9 carat natural boulder opal pendant from Winton, Queensland displays vibrant blue and purple fire in horizontal bands across dark brown ironstone matrix. The color appears in distinct layers that create contrast between luminous fire and natural earthy backing. The layered pattern gives this piece dimensional appeal with rich visual depth. Winton boulder opals form in ironstone nodules and seams where precious opal fills natural cavities, creating distinctive Australian gemstones with substantial presence and authentic character.

Measuring approximately 45 × 26.5 × 8 millimeters, this boulder opal pendant arrives ready to wear on a dark brown adjustable cord necklace. The polished freeform shape follows natural contours while showcasing the dramatic horizontal color bands. The adjustable cord allows customized length to suit any neckline or outfit preference. The substantial size creates statement impact perfect for casual everyday wear or bohemian jewelry style. For those who prefer permanent settings, this pendant can be professionally reset into sterling silver, yellow gold, white gold, rose gold, or bronze.

This is a 100% natural, untreated solid boulder opal, not a doublet or triplet. The opal and ironstone formed together millions of years ago in the Queensland opal fields, ensuring authentic Australian origin with natural durability. The ironstone backing provides stability and foundation for the precious opal layers that display fire across the surface.

Boulder opal pendants like this piece represent quality Australian gemstones at accessible price points with good value craftsmanship. As the official opal October birthstone, this pendant offers October born individuals a meaningful gift that celebrates their birth month with authentic natural beauty. The earthy appeal, vibrant layered fire, and substantial size make this an excellent choice for collectors or anyone seeking distinctive statement jewelry with natural character. This boulder opal pendant necklace will arrive securely packaged in an Opal Galaxy luxury gift box, ready to wear immediately.