I bought a ring marked DMpd950.

DM is the manufacturer code or brand name.

PD950 indicates that the ring is made of palladium, and the palladium content is 95%.

Palladium, a member of the platinum group, has the element symbol Pd, which is similar to platinum in appearance, silvery white metallic luster and bright color. The specific gravity is 12, which is lighter than platinum and has strong ductility. Melting point 1555℃, hardness 4-4.5, slightly harder than platinum. Chemical properties are relatively stable, insoluble in organic acids, cold sulfuric acid or hydrochloric acid, soluble in nitric acid and aqua regia, and it is not easy to oxidize and lose luster under normal circumstances.

Palladium is cheaper than platinum, and is used by jewelry industry alone or as a component of gold, silver and platinum alloys. Sometimes ruthenium is added to increase its hardness. Common gold in the market, palladium's K gold and platinum-palladium alloy. Specifications are marked with Pd 1000, Pd950 and Pd900.