Vintage ridged two-hole bright turquoise beads

This is a textured bead rather than a patterned bead. The bead is ridged on the front with the ridges running in the same direction and at the same place as the holes. The color is a bright turquoise which makes me think these beads are from the 1980s. The back is flat. The bead is 14 mm long and 10 mm wide. It is 4 mm thick and the holes are approximately 3 mm apart. These are glass beads made in molds in Czechoslovakia. Price is for 10 beads.