Type | Typical Purity Range | Description |
---|---|---|
High-Grade Dore | 92% – 98% Au | Usually from large-scale miners; ready for refining |
Mid-Grade Dore | 85% – 91% Au | Common from artisanal or small-scale miners |
Low-Grade Dore | 70% – 84% Au | Requires substantial refining; often mixed with silver and base metals |
Type | Typical Purity Range | Description |
---|---|---|
High-Purity Nuggets | 90% – 97% Au | Found in rivers, streams; often manually recovered |
Fine Particles / Dust | 85% – 95% Au | Raw form; may contain natural impurities (e.g., silver, iron, copper) |
Mixed Alluvial | 70% – 84% Au | May require smelting to determine true purity |
Standard | Purity | Issuer |
---|---|---|
London Good Delivery | Minimum 99.5% Au (995.0) | LBMA-accredited refiners |
COMEX Standard Bar | Minimum 99.5% Au (995.0) | NYMEX/COMEX-certified refiners |
999.9 Investment Grade | 99.99% Au (999.9) | High-purity bars for sovereign reserves, ETFs, retail investors |
Purity Level | Purity (%) | Label / Usage | Notes |
---|---|---|---|
9999 Fine Silver | 99.99% | Ultra-high-purity silver | Premium bars, sometimes used in investment-grade bullion |
999 Fine Silver | 99.9% | Standard investment silver | Most common in bullion (1 oz to 1,000 oz bars) |
998 Fine Silver | 99.8% | Less common | Still qualifies as nearly pure silver |
995 Fine Silver | 99.5% | Good Delivery minimum standard | Meets LBMA and COMEX minimum for trading |
Standard | Purity (%) | Description |
---|---|---|
LBMA Good Delivery | 99.9% min | Typically ~1,000 troy oz, accepted in global trade |
COMEX Silver Bar | 99.9% min | Also ~1,000 troy oz, used in US futures contracts |
Purity Level | Purity (%) | Label / Usage | Notes |
---|---|---|---|
999.5 Fine Platinum | 99.95% | Standard for bullion bars | LBMA Good Delivery standard; widely accepted |
999 Fine Platinum | 99.9% | High-purity investment bars | Rare but exists in limited mints |
999.9 Fine Platinum | 99.99% | Ultra-pure platinum | Very rare, premium-grade |
Standard | Purity (%) | Bar Size | Description |
---|---|---|---|
LBMA Good Delivery | 99.95% min | 1–6 kilograms | Used for international trade and institutional holdings |
NYMEX Platinum Bars | 99.95% min | 1–110 troy ounces | Meets COMEX rules for platinum delivery |
Purity Level | Purity (%) | Label / Usage | Notes |
---|---|---|---|
999.5 Fine Palladium | 99.95% | Standard for bullion bars | Industry standard for trading and investment |
999.9 Fine Palladium | 99.99% | Ultra-high purity investment bars | Rare, premium-grade for collectors or special markets |
Standard | Purity (%) | Bar Size | Description |
---|---|---|---|
LBMA Good Delivery | 99.95% min | Typically 1–6 kilograms | Must meet specific dimensions, weight, and markings |
NYMEX Palladium Bars | 99.95% min | 10 to 110 troy ounces | Meets COMEX standards for delivery and futures |
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