Art Nouveau Opal Pendant Brooch Combo with Large Mexican Jelly Opal

Organic and expressive, this Art Nouveau pendant brooch showcases the era’s love of flowing natural forms and unusual gemstones. Crafted in 14k two-tone gold, the design features sculptural “worm wood” style detailing that echoes the sinuous lines and botanical inspiration typical of Nouveau jewelry.

At the center sits a striking Mexican jelly opal, prized for its glowing transparency and vivid flashes of fiery orange and gold. The opal displays noticeable crazing—fine internal fissures that can develop in hydrophane opals over time—which gives the gemstone a distinctive antique character and reflects its age and natural history.

Dating to around 1915, this piece offers the versatility of being worn as either a pendant or a brooch. Its artistic metalwork and luminous opal make it a beautiful example of early 20th-century jewelry that blends natural inspiration with distinctive antique charm.

Details: Art Nouveau pendant brooch crafted in 14k two-tone gold featuring a Mexican jelly opal with “worm wood” style design; convertible pendant/brooch; opal shows crazing; circa 1915.