Fool’s gold is a naturally occurring mineral that resembles real gold but has minimal value. Fool’s gold is scientifically known as pyrite (chemical name is iron sulfide, FeS₂). Other names for fool’s gold are brass, brazzle, and brazil, primarily used to refer to pyrite found in coal. While real gold costs over $100 per gram, … Read more

A coin’s edge is the border encircling its circumference, sometimes called “the third side,” and serves both decorative and security purposes. Common types include smooth (plain), reeded (grooved), lettered, decorated, and knurled edges. Reeded edges are the most effective at preventing counterfeiting and coin clipping. This is why U.S. dimes and quarters feature reeding. Coin … Read more

White gold patina is a natural change in appearance that happens as the rhodium plating on white gold jewelry wears away, revealing the warmer, yellowish tone of the underlying gold alloy. This differs from tarnish, which is undesirable oxidation. White gold patination is simply the plating fading, and some people like the look while others … Read more

Rose gold vermeil is jewelry made by coating a sterling silver base with a thick layer of rose gold, at least 10k purity and 2.5 microns thick, giving it the look of solid rose gold at a more affordable price. It differs from regular rose gold plating, which lacks standardized thickness or purity and can … Read more

Red gold is a real gold alloy created by combining yellow gold with copper and trace amounts of silver. The high copper content (higher than rose gold) gives red gold its distinctive pinkish-red hue and increases its hardness and durability. Red gold is available in 10k, 12k, 14k, and 18k variants, with 14k and 18k … Read more

Coin reverse is the back side of a coin, opposite the obverse, and is commonly known as “tails.” It typically features designs that complement the obverse, such as national symbols, commemorative themes, or informative inscriptions. Some coins depict historical figures on both sides, adding visual interest. A coin’s condition matters greatly on the reverse, since … Read more

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