metals
Gold Purity Explained: Karats, Fineness, and Fine Gold Weight
Learn how gold purity works, convert karats to fineness, understand 999.9, 916, 750, and 585 marks, and calculate the fine gold in coins and bars.
Guide library
Bullion guides
Practical explanations for understanding bullion premiums, melt value, precious-metal weight, and purity.
metals
Silver Purity Explained: .999, .925, and Other Standards
Learn what .999, .925 sterling, .9584, and .900 silver mean, how to read silver fineness marks, and how to calculate fine silver weight and value.
basics
Troy Ounce vs. Ounce: What’s the Difference?
Learn the difference between a troy ounce and a regular ounce, convert grams to troy ounces, and calculate the fine metal weight of coins and bars.
calculations
How to Calculate Bullion Premium Over Spot
Learn how to calculate bullion premium over spot in dollars and percentages, with formulas and examples for coins, rounds, and bars.
basics
Spot Price vs. Melt Value: What’s the Difference?
Learn the difference between spot price and melt value, how weight and purity affect a coin or bar, and why retail and resale prices can differ.
basics
What Is Premium Over Spot? A Simple Guide for Bullion Buyers
Learn what premium over spot means, why physical bullion costs more than its metal value, and how to compare premiums on coins, rounds, and bars.