2 Vintage Opalescent White Japan Glass Cabochons from 450 /per Qty. Qty available: 11 Add to Cart Measure 25mm. Vintage handmade opalescent milky clear white Japan round glass cabochons. Partially drilled, they were meant to be used as button fronts. Each will vary slightly in size, shape, and color being handmade. SKU: BB2273 Tweet