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What to know about jewelry & watches
Two pieces can look identical in a photograph and be worth a hundred times different amounts, so this category rewards reading the materials line above everything else. Solid gold, gold filled and gold plated are three different products sharing one color. Solid keeps its value and can be repaired, gold filled carries a thick bonded layer that survives years of wear. Plating is measured in millionths of an inch and will eventually wear through at the edges that rub. The same split runs through stones, where a lab grown diamond is chemically identical to a mined one while a simulant only resembles it, and through pearls, where cultured and imitation sit far apart in both price and durability.
If your skin reacts to jewelry, nickel is usually the reason, and the word hypoallergenic is not regulated and promises nothing on its own. Look for a stated nickel free alloy, or choose solid gold of a suitable karat, platinum or implant grade titanium.
Sizing has real conventions worth knowing before you order. Necklaces and bracelets are sold in inches, ring sizes follow a numbered scale, and watch cases are measured in millimeters across the dial. Each guide below explains its own measurements, the styles you will see named, and what tends to fail first.