Vintage 14K Solid Gold And Carved Ivory (?) Bone Dome Ring

Rare vintage dome shaped ring. From the time period between 1960th and late 1970th. Hand carved from natural bone of white color. Feels smooth and soapy. Could be pre-banned ivory, but can't say for sure. The ivory ban happened in 1989. 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 beautiful and can be worn as is.