What is a vintage brooch worth?

Clasp type as a dating tool

C-clasp (a simple c-shaped hook) indicates work from before circa 1900.

Trombone clasp (sliding cylinder) is mainly from 1900–1930.

Rollover and safety clasps emerged from the 1930s and are still in use today.

A modernised clasp on an old brooch can depress its value. The needle itself is also an indication: thick, slightly coarser needles belong to old work; slender polished needles are later.

Material — costume or precious?

Vintage costume brooches (gilt brass with glass stones) are often underestimated. Big names like Trifari (Alfred Philippe designs), Coro Duette, Miriam Haskell and the couture lines of Chanel or Christian Dior are vibrant collecting markets. A signature on the back can turn a €40 brooch into a €400 one.

Precious metal brooches (gold, platinum, with real gemstones) are appraised differently: intrinsic value plus design. An 18kt brooch weighing 12 grams with a good sapphire and original setting can quickly exceed a thousand euros.

Figurative versus abstract design

Figurative brooches (animals, insects, flowers, trompe-l'oeil) have historically performed better than purely abstract forms — with the exception of sleek art deco geometric work. Horses, dogs, cats, dragonflies and bees are evergreens; political or coronation year brooches are niche collection items.

Wearability and size

Oversized pieces from the 1980s are not for everyday wear; this extra 'stunt factor' sometimes depresses the price during appraisal. Medium-sized brooches (4–7 cm) with a secure, modern clasp are commercially the most sought after and fetch slightly more than very large or very small variants for comparable designs.

Marcasite, paste and glass — the entry level

Marcasite (small, faceted iron pyrite stones, usually set in silver) sparkles darker than diamond and is typical for art deco and 1930s brooches. Quality work with evenly sorted stones and original silver settings is a fine entry into the collecting market. Missing marcasite can be replaced — report it during appraisal. For the in-depth guide on pyrite-in-silver, hand-set versus cast work and the art deco workshop context, see the gemstone guide marcasite.

Converting to a pendant — a value question

Technically, almost any brooch can be converted into a pendant, but for a collectible or precious piece, this will depress its value. Preserve the original and have a replica pendant or extra attachment (e.g., a pendant loop) made if you want to wear it without altering the original construction.