I believe from Google lens this is a vintage 1960s horn and abalone mother of pearl vintage necklace, very stunning and unusual
Victorian Black Lacquer And Abalone Book Cover
Ebony Shoe Horn and steel Button Hook
Antique Victorian Mother of Pearl Abalone Inlaid Card Case Used
Tabatiere c.1870 TORTOISE PLATE Mother of Pearl BRASS INLAID Floral Decor ANTIQUE Horn
Indian Mother Of Pearl Inlay & Horn Wood Bangle Boho Mosaic Design. i8-24
Antique Slim Glass-fronted Cabinet With Barley Twist Legs And Horn Handle.