In its original box stamped Ole W. Jacobsen, Juvelerer, Lille Kongensgade 45, this Danish Modernist ring is by Ole Waldemar Jacobsen, who ran a jewelry workshop at that address in in Copenhagen from the 1950s through the early 2000s (but the box's materials and font tell me this ring was from the 1950's - 60's.) He was known for sculptural, modernist designs in silver and gold, often using natural stones like agate, turquoise, and opal. This example features a GIANT oval slab of veined blue opal—likely sourced from Peru or Australia.Jacobsen's designs often featured natural gemstones like opal, turquoise, and agate, set in minimalist yet striking settings. His work reflects the mid-century Scandinavian design ethos—clean lines, organic shapes, and a focus on craftsmanship.
MATERIALS: 14k gold (marked 585), 1 1/4" tall oval slab of veined blue opal
AGE: c. 1960
CONDITION: Very good
SIZE: 6, can be resized; 1 1/4" x 5/8" face, 1/8" shank