Iridium coins and bars exist, but they’re far rarer than gold, silver, platinum, or palladium bullion. Iridium bars typically have .9995 purity, made by companies like American Elements and Luciteria for industrial use, though collectors can buy them too. Iridium coins are nearly impossible to mass-produce because the metal is extremely hard with a very … Read more

The obverse of a coin is its front side, commonly called “heads”, usually featuring a portrait, national symbol, or other prominent design. On U.S. coins, the obverse typically carries the date and often depicts presidents or notable figures, while the reverse (“tails”) shows the denomination, an eagle, or other secondary imagery. A notable minting flaw … Read more

Rhodium isn’t magnetic. It’s paramagnetic. This means rhodium is weakly attracted to a magnetic field and doesn’t retain any magnetism after being exposed to a magnet. Pure rhodium doesn’t magnetize, but rhodium alloyed with some other metal becomes magnetic or ferromagnetic depending on the metal it’s alloyed with. Is it Possible to Test Rhodium Purity … Read more

Rhodium doesn’t tarnish. It’s a noble metal that doesn’t corrode, rust and oxidize under normal day-to-day circumstances. However, rhodium plating on jewelry wears off over time exposing the base metal underneath, which then tarnishes and discolors. Does Rhodium Tarnish? Does it Corrode, Rust and Oxidize? No, rhodium doesn’t tarnish. It’s a noble precious metal highly … Read more

Does osmium tarnish? Does it corrode, rust and oxidize? No, osmium doesn’t tarnish. Osmium is a highly stable precious metal that doesn’t tarnish under any circumstances. Osmium is very corrosion-resistant and immune to most substances you can throw at it. Only substances like chlorine and fluorine corrode osmium with long-enough exposure. Finally, osmium is very … Read more