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Product line
Vendome and Corocraft worth more
Coro Marks and Signatures
Learn how to identify authentic Coro pieces by their marks and hallmarks.
Coro
1920s-1970s (main line)
Corocraft
1930s-1960s (higher-end line)
Vendome
1940s-1970s (premium line)
Coro Sterling
1940s-1950s (sterling pieces)
Coro Jewelry Value Factors
Several factors determine the value of Coro jewelry in today's market.
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Duettes
Innovative convertible brooch design
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Sterling pieces
Higher material value
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Designer pieces
Adolph Katz designs command premium
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Coro Gallery
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The Duette: Coro's Signature Innovation
One clever mechanism made Coro famous — and completeness drives the value.
The Duette is Coro's signature convertible design: two matching dress clips mounted on a shared frame. Worn together on the frame, the clips form a single large brooch; slipped off, they become a pair of clips for a collar, neckline, or lapel. It was one of the most versatile mechanisms in costume jewelry, and other makers spent decades imitating it.
Because the frame was a separate part, surviving Duettes are frequently found incomplete — a single clip, or a pair of clips with no frame. A complete Duette with both clips and the original frame is worth significantly more than loose clips, so it's worth searching the jewelry box before assuming a piece is "just a clip."
A past-sale example from our eBay store: a 1948 Harlequin Duette in green and clear rhinestones from the Adolph Katz design era — a figural harlequin brooch that shows why Katz-era Coro leads the collector market.
What We Look At When Evaluating Coro
Founded in 1901 by Emanuel Cohn and Carl Rosenberger, Coro grew into the largest costume jewelry maker of the 1920s-1960s — so knowing the lines matters.
The line. Coro is the main line. Corocraft, the higher-end line of the 1930s-1960s, used better materials and designs. Vendome, launched in the 1940s, was the premium line with the highest-quality stones. Corocraft sterling pieces from the 1940s-1950s carry real silver value on top of collector value.
The designer. Adolph Katz designs command a premium. His era produced the Duettes, figural brooches, and elaborate rhinestone work that Coro is remembered for — and that collectors compete for today.
Completeness and condition. We check for Duette frames, matching brooch-and-earring sets, all-original stones, intact plating, and working clips and clasps. Coro's huge production volume means most main-line pieces are affordable — but complete Duettes, Katz-era Corocraft, sterling, and Vendome punch well above the average.
Coro FAQs
Coro pieces range from $30 to $300+ depending on line and rarity. Corocraft and Vendome pieces command higher prices. Duettes and sterling pieces are most valuable.
Look for 'Coro' marks. Higher-end Corocraft pieces are marked 'Corocraft' and Vendome pieces 'Vendome.' Duettes feature two brooches with a frame that converts them to a double-clip.
Coro was the main line. Corocraft was the higher-end line with better materials and designs. Vendome was the premium line launched in the 1940s, featuring the highest quality stones and designs.
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