Vintage 1970s Blue Plastic Brooch Geometric Square Navy White Costume Jewelry

The navy-and-white contrast on this piece is sharp enough to read from across a room.

A small square brooch in dark navy blue plastic, with a white geometric motif on the front face: a ring of repeating cross-shaped units surrounding a central circle. The format is clean and graphic — the kind of bold, flat design that belonged to the 1970s–80s.

At 1.5 × 1.5 cm it sits flat and lightweight. The smooth plastic body has no surface texture — the decoration is entirely in that precise white-on-navy pattern.

The scale is compact enough for a lapel or collar, or pinned to a scarf or hat brim. It pairs naturally with navy, cream, or black — anything where a single graphic accent does the work of several pieces.

Details

• Type: Brooch
• Era: 1970s–1980s
• Material: Plastic
• Size: 1.5 × 1.5 cm
• Weight: 3 g
• Marked: No
• Closure: Pin-back clasp
• Style: Geometric

Condition

Excellent · No chips, scratches, or wear; pin mechanism intact and functional.