I had the pleasure of coming across a cache of vintage, double faceted 20mm glass jewels in a beautiful dark emerald green. They're quite old, hard to find and are considered new/old stock. They're also in a shade that's not available currently through stained glass distributors.
They're wonderful to use in both copper foil and leaded projects.
Each purchase is for six (6) dark green 20mm double faceted glass jewels.