Vintage White Pearly Flower Shell Buttons 3/4" 8 Petals 19mm, Natural Off-White, Pack of SIX #VB-38

Vintage Mother of Pearl shell with subtle flower shaping and softly scalloped edges, in natural white / ecru / ivory tones. They're quite thick and substantial, have a dip in the center and eight plump petals carved into the pearl. Backs are smooth. They're shiny, smooth, sleek and lustrous, a few with natural features like some light brown, and some are more iridescent than others. (No two are exactly alike as you can tell). Excellent condition never used vintage. Probably USA-Made, 1930's-50's? Holes are about 1.5mm.  Sold per pack of 6 buttons.