Element 78 on the Periodic Table, Platinum (Pt) It is a silver-gray, lustrous, malleable precious earth metal, often alloyed with other members of the Platinum Group (Iridium, Osmium, Palladium, Rhodium, and Ruthenium).The full potential of Platinum and Platinum Group Metals (PGMs) are just beginning to be rediscovered. Clearly a vital element in ..