Antique Art Deco 18K Platinum Old Mine Cut Diamond Emerald Capsule Pin

Understated, linear, and unmistakably early Art Deco, this original period pin reflects the precision and contrast that defined the era. Crafted in 18 karat yellow gold, the diamonds are set in platinum, creating a crisp visual separation that enhances their brilliance. Two polished onyx terminals anchor the composition, framing rows of original old mine cut diamonds and square-cut calibrated natural emeralds. The interplay between deep black onyx, luminous antique diamonds, and rich green emeralds gives the piece its striking geometric presence.
The diamonds retain their original character and soft antique fire, adding authenticity and period integrity. The pin assembly is original to the piece. Please note that two emeralds show damage; however, the remainder of the brooch is in fantastic overall condition.