Real 14K gold stripes on vintage Brutalist carved bone dome ring, size 7.5

Rare vintage dome ring. Carved of what looks like natural carved bone of very white color. With solid 14 karat gold stripes. Size 7.5 Stamped 585 14K on the inner plate, which is also made of solid 14K gold. One gold stripe is missing, as shown in pictures. But the ring is still very unique and beautiful and can be worn as is. Also it should be very easy for the jeweller to fix it by adding stripe of a flattened gold wire.