MK3 BLACK CONCRETE RING, SYMMETRIC | Cement RingMK3 Black Concrete Ring Architecture Inspired Minimalism Squared, contemporary, and essentialthe MK3 Black Concrete Ring brings an urban, architectural vibe to any jewelry collection. Inspired by Berlins iconic MK3 building, this geometric piece translates city scale design into a wearable statement thats as comfortable as it is bold. Weighing just 2. 53. 3 grams, its engineered to feel nearly invisible on the finger while delivering a powerful design