Composition: 18 and 22 karat gold, garnet or rubellite (red tourmaline), cut in cabochon shape Production method: Handmade Condition: very good Dimensions: 1.6 x 1.3 cm Color: gold, green, white Marking: "22K", “18 KP”, “SDPB” Country: USA Period: 1960s-1970s Market value: 600-800 EUR
Compact, delicate, but very expressive - perfect for modernist or brutalist aesthetics. These earrings have an exclusive design, typical of studio jewelry. The marking "18K" indicates that the earrings are made of 18-carat gold, and the letter "P" stands for "Plumb", i.e. a guaranteed minimum amount of gold (US practice since 1980). The top layer or certain parts are coated or made of 22-carat gold (almost 92% purity). K stands for karat, which is the purity of the gold. 22 K is 91.6% pure gold, 18 K is 75% pure gold. KP - indicates that the purity of the gold can be higher. Double-layer structure - a piece of jewelry made of 18K gold with 22K gold details or inserts (a common high-class design practice).
