Vintage Large Domed Ebony & Bone Check Clip Earrings

Vintage ladies large clip earrings. Round dome shape and made up of squares of black ebony and off-white bone, forming a checkered pattern. 3.5cm in diameter. Possibly Gerda Lynggaard of Monies, although not signed. Good vintage condition and the clips work well. These earrings could be used for other purpose: perhaps in a carpentry project?