Vintage Serpentine or Jade Cabochon Brooch

This is an oval-shaped vintage brooch featuring a substantial cabochon-cut stone, likely serpentine or a type of jade, set within a decorative gold-toned metal bezel. The central gem exhibits a captivating mottled pattern of various green hues, ranging from olive and moss green to lighter chartreuse streaks and occasional darker grey or black inclusions, indicative of its natural volcanic or metamorphic origin. The stone has a smooth, polished domed surface, allowing its inherent patterns to come through. Encircling the stone is an elegantly crafted twisted rope border, providing a classic and refined frame. The metal appears to be of a yellow gold color, suggesting it could be gold-filled, rolled gold, or a base metal with gold plating, showing minor signs of patina or surface wear consistent with age. No immediate chips or cracks are discernable on the stone from this perspective, and it appears securely set. The overall style is characteristic of vintage jewelry, possibly from the early to mid-20th century (e.g., Art Deco or Mid-Century era), combining natural materials with conventional ornamental motifs. While no specific maker's marks are visible, the piece demonstrates a good standard of craftsmanship for its type, suitable for a detailed appraisal report.