Standard Castings

Bullion weights are standardized measurements used to quantify precious metals like gold, silver, platinum, and other metals in their raw, unrefined form. These weights help determine the value of bullion and are typically measured in troy ounces, which differ from regular ounces used for other commodities.

Here’s a breakdown of key aspects of bullion weights:

1. Troy Ounce:

   • The primary weight used for precious metals.
   • 1 troy ounce = 31.1035 grams (compared to 28.3495 grams in a standard ounce).
   • Bullion is usually bought and sold in troy ounces.

2. Gold Bullion:

   • Typically found in bars, coins, or ingots.
   • Common weights include 1 oz, 5 oz, 10 oz, 1 kg (about 32.1507 oz), and 400 oz bars (standard in central banks).
   • The purity of gold bullion is important (often 99.99% pure or "four nines").

3. Silver Bullion:

   • Silver is often bought and sold in 1 oz coins, bars of 5 oz, 10 oz, 100 oz, or larger kilo bars.
   • Like gold, silver bullion is often refined to high purity (99.9% pure or higher).

4. Platinum and Palladium Bullion:

   • Also measured in troy ounces, these metals are often sold in bars, coins, or ingots.
   • Weights can range from 1 oz to much larger bars like 10 oz or 1 kg.

5. Bullion Coins:

   • Coins are commonly minted in standard weights like 1 oz (e.g., American Gold Eagle, Canadian Maple Leaf).
   • These coins also carry a face value but are generally valued based on the metal content.

6. Purity:

   • Purity is crucial in bullion as it determines the quality and market value.
   • For example, a 24k gold coin or bar is 99.99% pure gold.

Bullion weights help ensure that buyers and sellers agree on the amount of precious metal being transacted, and the weights play a role in determining pricing, which is influenced by market values of these metals.