... (hardening agent for gold and platinum alloy) 1.Purity:99.95% 2.Particle size:200mesh 3.Brand:JM,Heraeus,Anglo Product ... Description: Iridium PowderPurity:99.95%Particle size:200meshColor:dark grey powderBrand:JM,Heraeus,AngloPacking:100g ... Fe22212212212 2BMnCd 222 Our picture of iridium : iridium powder 99.95%