This element, Pt, is used in crucibles & tongs because of its inertness & high fusing point
... High-purity 
oxygen is used also in the metal-fabrication industries; in liquid form it is of great 
importance ... Because of its chemical inertness and high fusing point, platinum is 
valuable for laboratory apparatus, such as crucibles, tongs, funnels, combustion... [DOC] [TLE] The Platinum Metals [PAR] Melting point, C ... Ruthenium, symbol Ru, is a grayish-white metallic element.