One of my best finds! These come in their original package with a color name Sapphirine. Flat backed, unfoiled and with frosted finish. Sappharine glass is a combination of brown with blue. How interesting, the hue of blue is inconsistent in these stones, from aqua to sapphire to almost purple?
So happy to find these for I've searched for Saphiret or Sapphirine glass for jewelry making. I'll probably use silver colored settings for these so the silver color metal will glow through the stone and present the color play of blue and brown!