Probably contains manganese which slightly glows under 365nm UV FLASHLIGHT.
1991 SIGNED ROBERT EICKHOLT ART GLASS IRIDESCENT PINCHED PAPERWEIGHT SCULPTURE
Igor Muller Iridescent Blue Studio Art Glass 6" Perfume Bottle Signed Fusion Z
ROBERT EICKHOLT ART GLASS 1991 IRIDESCENT PERFUME BOTTLE
Robert Eickholt Art Glass Paperweight Iridescent Blue/Green 3.5" Signed 1986 EXC
ROBERT EICKHOLT ART GLASS Clear Iridescent Paperweight Signed 1991 Flat
Robert Eickholt Art Glass Vase Anemone Flowers Iridescent 6.5" Signed Purple
