Retro Era Yellow Gold, Sapphire, and Diamond Bow Brooch

This is a substantial Retro-style brooch fashioned as a voluminous, three-dimensional ribbon bow. The base structure is crafted from highly polished yellow gold (likely 14k or 18k), featuring wide, fluid loops that exhibit the bold, sculptural aesthetic typical of the 1940s. Centered atop the gold bow is an intricate spray or starburst motif rendered in a contrasting white metal, possibly platinum or white gold. This floral-inspired spray is pave-set with numerous small round brilliant-cut diamonds and accented with round-cut dark blue sapphires. The sapphires are arranged in clusters and as terminal points on the delicate white metal branches. Regarding condition, the yellow gold surface shows visible micro-scratching, light scuffs, and several noticeable indentations or 'dents' on the lower loops, which is common in hollow-constructed jewelry of this scale. There appears to be some grime accumulation around the stone settings, requiring professional cleaning. No maker's marks are visible from the front view, but the craftsmanship suggests a high-quality mid-20th-century jewelry house. The piece measures several inches in diameter, serving as a prominent statement accessory.

I have conducted a visual examination of this substantial Retro Era bow brooch. The piece exemplifies the 1940s 'Hollywood Regency' aesthetic, utilizing a bold volumetric design in yellow metal (presumed 14k-18k gold) with a contrasting diamond and sapphire spray. My inspection reveals significant physical wear, including various indentations and micro-scratches on the hollow-constructed gold loops, which are typical for high-wear vintage items but detract from 'mint' valuation. The sapphires exhibit a rich, dark saturation, and the diamond work appears to be high-quality pave execution. Current market demand for Retro-era 'Big Bow' jewelry remains strong among collectors sought for its sculptural architectural appeal. This piece is particularly desirable due to its bi-color metal configuration and complex central cluster. However, several limitations must be noted. Without a physical inspection, I cannot verify metal purity via acid or XRF testing, nor can I confirm if the stones are natural, synthetic, or heat-treated. The lack of visible maker's marks from this angle means I cannot currently attribute this to a specific house like Van Cleef & Arpels or Boucheron, which would significantly increase the valuation. Full authentication would require an in-person examination of the pin mechanism for hallmarks, a carat weight measurement of the gemstones, and a thorough cleaning to assess the stones' clarity. Consequently, this appraisal represents an estimated fair market value based on similar sold auction lot comparables for unsigned mid-century jewelry of this scale and material composition.