Check the listing for details. Element collection - doped glasses - 24 pcs. Solid spectroscopy standards. Condition: New. Listed at 299.00 USD. Large Set of metal ions doped optical glasses - 24 pcs. This collection is unique in the world! Save over $450 compared with purchasing them separately! Colorful Set of doped optical glass beads - 24 pcs. Size approx. 13mm - weight approx. 1 - 1.5g - Material: phosphate and borate glasses Elaborately and individually manufactured by us in the laboratory from highly pure reagents. Gorgeous beads showing the typical colors of different metal ions in different oxidation states. The top row shows the colorless glasses, which illuminate under UV (395nm + 254nm) : europium, cerium, terbium, samarium, dysprosium, manganese and silver below the glasses doped with high-purity metal oxides and nanoparticles (gold): Copper, molybdenum, tungsten, cobalt, praseodymium vanadium, chromium, Holmium, iridium, nickel, bismuth, rhodium, iron, erbium, Neodymium, gold, manganese On the second picture you find some additional glass beads like Ruthenium, Titanium, Gadolinium which are also available separately. A feast for the eyes of element collectors! scope of delivery You get one Large Set of metal ions doped optical glasses - 24 pcs. shipping fees I am happy to combine shipping to save you money! Please contact me!