Dark Emerald Vintage Japanese Pearlized Stripe Lustrous Buttons, Set of Seven #MV79

15/16" the long way, about 13/16" the short way, rounded rectangles that glow and shine. We think they're resin or a combination of resin and shell. They're very smooth, sleek and light in weight; too light to be glass or stone, but they look like shell, glass, and/or polished stone. The hole on the back is about 1.5mm.  No two will exactly match; six are deep rich layers of emerald green and one is layers of silvers with indigo/black. Age unknown. Condition perfect.  You'll get all seven; the exact ones shown. Exceptional. Japan.