S925 sterling silver gold-plated Japanese retro-style necklace, featuring an elegant vintage diamond-shaped pendant. The geometrically latticed openwork frame encloses a polished black agate stone, creating a sophisticated contrast between the gleaming metallic finish and the deep, opaque gem. This artful piece combines minimalist Japanese aesthetics with Art Deco-inspired precision, resulting in a timeless accessory that exudes refined elegance. Perfect for layering or as a standalone statement, it captures a sense of nostalgic charm and modern versatility.