The Sacagawea dollar, first minted in 2000, features Sacagawea and her son on the front. Despite its golden color, it’s made of manganese brass over copper, not gold. The coin proved unpopular, leading to decreased production. Most are worth only $1, but rare varieties are highly valuable. Notable examples include the “Cheerios Dollar” with enhanced … Read more
Does iridium tarnish? Does it rust, corrode and oxidize? No, iridium doesn’t tarnish. It’s one of the most corrosion-resistant metals known to mankind and is resistant to tarnish, even at high temperatures. Iridium is unaffected by air, water, and most acids. And while it can react with oxygen at high temperatures and form iridium dioxide, … 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 also 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 … Read more
Does ruthenium tarnish? No, ruthenium doesn’t tarnish. It’s a highly resistant metal, especially to corrosion and oxidation, even at high temperatures. Ruthenium’s resistance to tarnishing makes it a popular choice for various applications, including electrical contacts, resistors, and jewelry finishes. Ruthenium oxidizes at temperatures above 800°C. But this early oxidation forms a thin oxide layer … Read more
What is a coin relief? What’s the meaning of it and what is a high-relief coin? Learn it right below in my quick guide. What is a Coin Relief (Meaning and Definition)? What is a High Relief Coin (Meaning and Definition)? What is a Low Relief Coin (Meaning and Definition)? What is an Ultra High … Read more
Does rhodium tarnish? Does it corrode, rust and oxidize? No, 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. Learn more below! Does Rhodium Tarnish? Does it Corrode, … Read more
Below are all the questions you might have about U.S. Mint gold coins. Enjoy and LMK in the comments if you want to know more. What Types of Gold Coins Does U.S. Mint Produce? Why Does the US Mint Gold Coins? Where are U.S. Mint’s Gold Coins Minted? When Did the US Mint Stop Making … Read more
Is pure platinum toxic to humans, yes or no? What about platinum bullion and jewelry? Are these safe or should you worry about them? Is platinum radioactive and dangerous? Find out right below! Is Pure Platinum Toxic to Humans? Or is it Safe? Which Platinum Forms are Toxic to Humans? Is Platinum Toxicity the Same … Read more
Palladium in solid form isn’t toxic and radioactive to humans and is safely used in jewelry, dental applications, and investment bullion. However, certain palladium compounds are highly toxic. These are palladium salts (ionic forms), palladium chloride and palladium nanoparticles. Palladium jewelry and bullion are completely safe as they contain solid palladium. Pure palladium flakes can … Read more
Does platinum tarnish or not? Does it oxidize, rust and corrode? No, pure platinum doesn’t tarnish, fade, dull or change color over time. It also doesn’t rust, corrode and oxidize. Platinum is a non-reactive “noble” metal that can’t tarnish and discolor. However, platinum alloyed with other metals over time develops a patina, a form of … Read more