Vintage Art Deco Style Bakelite or Celluloid Geometric Brooch Pair

This item consists of two matching geometric ornaments, likely a pair of dress clips or hat pins, featuring a distinct Art Deco aesthetic. Each piece is constructed from two panels of early synthetic resin, possibly Bakelite or celluloid, joined at a diagonal seam. The primary section displays a marbled salmon or coral-pink swirl pattern, while the smaller angular section is a solid jet black. Three circular clear rhinestones or glass pastes are inset along the diagonal junction, adding a touch of decorative brilliance. The elongated, trapezoidal shapes are characterized by sharp, clean lines typical of the 1930s-1940s design era. The construction appears to be machine-cut with hand-finished polishing, exhibiting a smooth, lustrous surface. Condition-wise, the pieces appear well-preserved with no visible cracks, heavy scratching, or missing stones, though there is minor surface dust and typical micro-wear consistent with age. No maker's marks are visible on the top surface. The items are resting on a handwritten note identifying them as an 'Old Hat Pin,' which may suggest their original use or provenance within a personal collection.