Minted Bar
Also: Minted bar, Stamped bar, Coin bar
A minted bar is a precious metal bar produced by mechanical stamping, with a smooth, dimensionally accurate surface and imprinted information such as fineness, weight and manufacturer logo.
A minted bar is created not by casting but by a multi-stage mechanical process: first, high-purity precious metal is rolled into a strip or band, from which blanks are then punched out using a stamping tool. These blanks are subsequently struck on high-pressure presses, which work the fineness, weight, manufacturer logo and often a serial number into the surface. The result is a visually even, dimensionally precise bar with sharp edges and a mirror-smooth or finely matte surface — considerably more uniform than a cast bar.
Manufacture and characteristics
The minting process requires considerable tooling effort and is more expensive per unit than casting. In return, it delivers reproducible dimensions with tolerances sometimes below ± 0.01 mm as well as a homogeneous surface without cavities or casting streaks. Renowned manufacturers such as PAMP Suisse, Valcambi, Heraeus and Argor-Heraeus additionally equip their minted bars with security features — for example finely rastered guilloché patterns or holographic elements that make counterfeiting harder.
Typical mandatory information on a minted bar:
- Fineness (e.g. 999.9 Au or 999 Ag)
- Weight in grams or troy ounces
- Manufacturer logo and name
- Serial number (usual from about 5 g)
- Mint mark of the refinery
Minted vs. cast – a comparison
| Feature | Minted bar | Cast bar |
|---|---|---|
| Manufacture | Rolling → punching → minting | Melting → casting → cooling |
| Surface | Uniform, smooth/matte | Individual, often with casting texture |
| Dimensional accuracy | Very high | Lower |
| Premium (agio) | Higher (production effort) | Lower |
| Packaging | Usually blister/assay card | Often loose or in a pouch |
| Common sizes | 1 g – 1 oz (100 g rare) | 100 g – 1 kg and larger |
| Typical buyers | Private investors, gift market | Large investors, refineries |
Denomination and packaging
Minted bars are especially widespread in small weight units: 1 g, 2.5 g, 5 g, 10 g, 20 g, 1 troy ounce (31.1 g) and 50 g cover the bulk of the private investor market. From about 5 g upwards, the bars are frequently delivered sealed in a transparent plastic cartridge — the so-called assay card or blister packaging. This packaging protects against fingerprints and mechanical damage and contains a printed authenticity certificate from the refinery.
Note: Opening the original packaging can reduce the resale value, as dealers generally buy sealed bars on better terms.
Melt value and premium
The intrinsic value of a minted bar results from the current gold price or silver price multiplied by the fine weight. You can determine the melt value at any time with our Melt Value Calculator. Above the melt value, buyers pay a premium (agio) that, for small denominations (1 g), is proportionally considerably higher than for 1-ounce bars. Anyone wishing to optimise storage costs and premium should compare several denominations with the Gold Calculator.
Authenticity testing
The precise dimensions of minted bars make authenticity testing easier: deviations in weight or thickness that point to tungsten cores or lead fillings can be detected quickly with a precision scale and a caliper. Further methods are density measurement using the Archimedes principle and X-ray fluorescence analysis (XRF). Our coin authenticity check provides a structured checklist for bars too.
Note: statements on tax effects (VAT exemption for investment gold, taxation of disposals) do not constitute tax or investment advice — please consult a tax adviser.
In brief
Minted bars combine the highest dimensional accuracy, an attractive appearance and easy authenticity testing — making them particularly suitable for private investors who wish to enter and exit flexibly with small weight units. The higher premium compared with cast bars is offset by better tradeability and broader dealer acceptance.