Czech diamond-cut window beads with silver edges in alexandrite glass. 10mm. 4 pcs. b11-bl-1199

10mm diamond-cut window bead with silver edges. In alexandrite glass.  These are mysterious beads.  Hold them up to the light, they're a pale blue.  If you hold them in your palm so you see reflected light, they are more of an amethyst. Both colors are shown in the photos., Contemporary Czech. Package of 4