Vintage Mother-of-Pearl Rectangular Brooch

This is a vintage rectangular brooch crafted from iridescent mother-of-pearl (nacre). The piece features a soft, rectangular shape with rounded corners and a slightly convex surface that catches the light to reveal a pearlescent luster typical of high-quality shell material. Coloration ranging from milky white to subtle silver and champagne hints is visible across its chatoyant surface. The construction appears to be a solid slab of shell, indicating a mid-20th-century aesthetic, likely from the 1940s to 1960s. A visible pin stem is seen on the left side, appearing to be integrated with a simple hinge and C-clasp on the reverse. The item shows light scratches consistent with age and use, though its edges remain relatively smooth without significant chipping. The craftsmanship is clean, focusing on the natural organic patterns of the shell rather than ornate metalwork. No maker's marks or stamps are visible from this angle, suggesting it may be a boutique or handmade artisan piece. The overall quality is characteristic of classic mid-century organic costume jewelry, emphasizing the raw beauty of natural materials.