Mixed Blue Stained Glass Minicobblets 2.5 Oz. MiniCobblets are tiny glass pebbles are made of beautiful Cathedral Stained Glass with the look and feel of translucent polished pebbles. Glass for crafts such as mosaics, collage, glitter, floral crafts and scrapbooking . Their unique sizes and shapes make craft projects fun and easy to do. The glass pieces range in size from 1/8th to 3/8. The color mix includes various shades of blues and may vary in hues depending upon stock availability.