Vintage molded glass 4 sided triangle beads with raku glaze. 16x10mm. Japan Pkg of 10-b11-bl-1151

This is an unusual and gorgeous vintage bead from Japan. 4 sided triangles. each side is the inverse of the side next to it. Hole runs vertically. 16x10mm. These appear to be hand made due to the irregularity of each bead. Milk glass with a sort of raku glaze with predominantly a dusty blue bits of copper and iridescent purple. These have a satiny matte finish. Just splendid. Package of 10.