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2.5 g Gold Bars
Number of products: 8Two and a half grams is the other answer to the question that produced the 2 g bar. Valcambi, PAMP and Umicore all make it; Argor-Heraeus, Metalor, the Perth Mint, the Royal Mint and Rand Refinery do not. Umicore gives 24 × 14 mm, roughly half a millimetre thick — wider than the 1 g bar, and no thicker.
Eight bars are listed in this category, all sealed in assay cards, all 999.9 fine. Because only three refineries make the weight at all, the choice of producer here is narrower than at 5 g or 10 g.
How big a 2.5 g gold bar actually is
Umicore is the only producer of this weight that publishes a specification. Valcambi and PAMP list the bar but not its dimensions, and we do not fill that gap with reseller figures.
| Refiner or standard | Dimensions | Form | Packaging |
|---|---|---|---|
| Umicore | 24 × 14 × approx. 0.5 mm | minted | sealed blister |
| Valcambi | in the minted range, dimensions not published | minted | sealed blister with certificate |
| PAMP | dimensions not published | minted | sealed CertiPAMP assay card, certificate number |
Interesting detail from the Umicore figures: the 2.5 g and 5 g bars share the same 24 × 14 mm face. As at Argor-Heraeus and Metalor further up the range, the refinery keeps the footprint and roughly doubles the thickness.
Where 2.5 g sits
This is a divided part of the range. Argor-Heraeus, C.Hafner, Metalor and Münze Österreich standardised on 2 g; Valcambi, PAMP and Umicore standardised on 2.5 g. There is no technical reason for the split and no difference in the metal — two conventions simply both survived.
The practical consequence is that the choice of weight here effectively chooses the refinery. If you want a PAMP Fortuna or a Valcambi in this size band, 2.5 g is the weight that exists.
Packaging at this size
At half a millimetre thick, a 2.5 g bar is not something you handle loose. Every producer seals it into a card that doubles as the assay document. PAMP calls its version CertiPAMP and prints a certificate number on it; Valcambi uses a sealed blister with a certificate and a serial number matched to the bar.
The seal is worth keeping intact. On a bar half a millimetre thick the card is also the only thing keeping it flat and handleable, and an unopened CertiPAMP or Valcambi blister is what a buyer will expect to see.
What you actually pay
Two and a half grams of gold at the market price plus the premium. As with every small bar, the premium is driven by fabrication rather than metal content, so it falls sharply as you move up towards the 5 g bar and the 10 g format. Live prices on our gold price page.
Questions buyers ask about this weight
How much is a 2.5 g gold bar worth?
Two and a half times the gold price per gram, plus the premium on the bar. Only Valcambi, PAMP and Umicore make this weight, so the spread of premiums between listings here is narrower than at 5 g.
How big is a 2.5 g gold bar?
Umicore publishes 24 × 14 mm at around 0.5 mm thick. Valcambi and PAMP do not publish dimensions for their versions.
Why 2.5 g and not 2 g?
The two weights coexist. Valcambi, PAMP and Umicore make 2.5 g; Argor-Heraeus, Metalor, C.Hafner and Münze Österreich make 2 g. Choosing the weight largely chooses the refinery.
What is CertiPAMP?
PAMP's sealed assay card. It carries the bar's weight, fineness and a certificate number, and is designed so that the bar cannot be removed without visibly damaging the packaging.
Do you buy 2.5 g bars back?
Yes, quoted against the current market price. Because only three refineries make this weight, the producer on the card matters more at resale here than at 5 g or 10 g. See the buyback page.
Other gold bar weights
0.5 g · 1 g · 2 g · 5 g · 10 g · 20 g · 1 oz · 50 g · 100 g · 250 g · 500 g · 1 kg
All weights are listed together on the gold bars page. For coin formats in the same metal, see gold coins.
