The London Bullion Market Association (LBMA) is the international trade association that oversees the wholesale gold and silver markets in London — the largest over-the-counter precious metals market in the world.
LBMA Good Delivery
| Metal | Bar Size | Minimum Purity |
|---|---|---|
| Gold | 350–430 oz (~400 oz nominal) | 99.5% (.995 fine) |
| Silver | 750–1,100 oz (~1,000 oz nominal) | 99.9% (.999 fine) |
Why It Matters for Investors
When purchasing bars, look for products from LBMA-accredited refiners. This guarantees the metal meets internationally recognized standards for weight, purity, and integrity.