Minted gold bars are high-purity investment gold bars produced by minting (pressing) rather than casting. They are manufactured from rolled gold blanks, cut to precise weight, and stamped under high pressure to achieve sharp edges, precise dimensions, and superior surface finish.
Minted bars are primarily targeted at retail investors, high-net-worth individuals, banks, and private vault clients.
Chemical Composition
| Element | Typical Content |
|---|---|
| Gold (Au) | 99.9 – 99.99% |
| Silver (Ag) | Trace (ppm) |
| Copper (Cu) | Trace |
| Other elements | Trace |
✔ No intentional alloying
✔ Assay-certified purity
✔ Higher average purity than minimum investment grade
Key Physical Properties (Gold)
| Property | Value |
|---|---|
| Density | 19.30 g/cm³ |
| Melting Point | 1,064 °C |
| Thermal Conductivity | ~318 W/m·K |
| Electrical Conductivity | ~70% IACS |
| Thermal Expansion | 14.2 × 10⁻⁶ /K |
| Magnetism | Non-magnetic |
| Corrosion Resistance | Excellent |
Mechanical Properties
| Property | Typical Range |
|---|---|
| Hardness | 30 – 40 HV |
| Tensile Strength | 150 – 220 MPa |
| Yield Strength | ~110 MPa |
| Elongation | 35 – 45% |
| Surface Wear Resistance | Moderate |
Increased surface hardness results from work hardening during rolling and minting, not alloying.
Manufacturing Process
Doré refining → high-purity gold casting → hot & cold rolling → precision blank cutting → optional annealing → high-pressure minting → laser marking & serialization → final assay and sealed packaging.
Available Sizes & Packaging
Common Sizes:
1 oz (31.103 g), 100 g, 50 g, 20 g, 10 g, 5 g, 2.5 g, 1 g
Packaging:
✔ Sealed assay cards (CertiCard)
✔ Tamper-evident blister packs
✔ Serialized certificates
Minted vs Cast Gold Bars
| Feature | Minted Bars | Cast Bars |
|---|---|---|
| Purity | 99.9–99.99% | 99.5–99.99% |
| Surface Finish | Excellent | Rough |
| Dimensional Accuracy | Very High | Moderate |
| Internal Porosity | Very Low | Higher |
| Premium | Higher | Lower |
| Typical Size | Small–Medium | Medium–Large |
Why Choose Minted Gold Bars?
Minted gold bars represent the highest refinement of retail investment gold, combining metallurgical purity, precise weight control, superior finish, and secure authentication. They command a higher premium than cast bars but offer unmatched trust, liquidity, and handling convenience for private investors and institutions.