Spot prices for gold, silver, platinum, palladium, copper, and zinc — in US dollars per troy ounce.
Every coin has two worth numbers: its collector (market) value — what someone will pay because of rarity, grade, and condition — and its melt value, the raw worth of the metal it contains. For business-strike modern coins, melt value usually sets a floor. For silver and gold coinage, melt value can exceed face value by an order of magnitude depending on spot prices.
LuckyCoin uses the live prices above to compute melt values across the catalog. Pre-1965 US dimes, quarters, and half dollars contain 90% silver and their melt value moves directly with the silver spot price. Pre-1982 cents are 95% copper and inch up as copper rises. Modern American Gold Eagles, Canadian Maple Leafs, and silver bullion issues track their respective metals almost 1:1.