These 1950’s era rhinestones were made in Germany. They are table polished stones and they measure 8×8 mm each. They’re a square shape with the corners clipped off (which technically makes them octagons). The tops have flat tables, and the sides are beveled and faceted. The backs are also faceted with gold foil and a slight dome – see the photos for a better idea.
The finish is listed as “iris”, and it’s a crystal clear glass base with thin ribbons of fucshia, aqua and sapphire blue.