The same coin design is often issued in two versions at very different prices. One is bullion, the other is proof, and buyers who do not know the difference sometimes pay a large premium for something they did not intend to buy.
The difference is manufacturing
Bullion finish coins are struck for efficiency. Standard dies, standard pressure, produced in volume. The result is a clean coin with a normal lustre. Small surface marks from handling and transport are ordinary and expected. These coins are made to be metal.
Proof coins are made to be objects. The dies are polished and often specially treated, each blank is hand fed, and the coin is struck several times at higher pressure so the design fills completely. The characteristic look is mirror-like flat surfaces with frosted raised detail. They are handled with gloves, individually packaged, and issued in limited numbers with a certificate.
You will also see brilliant uncirculated, which sits between the two: better finish than standard bullion, without the full proof process.
The price gap
A proof coin can cost substantially more than the bullion version containing identical metal. That premium buys the production process, the packaging, the certificate and the limited mintage.
Here is the part that matters. When you sell, most dealers price bullion coins on metal content. A proof coin sold to a bullion dealer will often be valued on the same basis as its bullion equivalent, meaning the proof premium is not recovered.
Proof coins can carry collector value, but that is a separate market with different buyers, different pricing and considerably less liquidity than bullion. It is not something to rely on.
Which to buy
If your goal is holding metal, buy the bullion version. You get the same gold or silver for less, and it sells back through the ordinary bullion market without complication.
If you want a proof coin because you like it, as a gift, or because you collect, that is a perfectly good reason. Just buy it knowing you are paying for the object rather than the metal, and do not expect a bullion dealer to price it as a collectible.
The mistake is buying proof because it looks like a superior version of the same thing. It is a different product.
Handling proof coins
Proof surfaces are delicate. A fingerprint on a mirrored field is immediately visible and effectively permanent, and even light contact leaves marks that reduce what a collector would pay.
Leave proofs in their original capsules and packaging. Keep the certificate with the coin, since for a collector buyer the packaging and paperwork are part of the item. Never clean a proof coin under any circumstances.
Frequently asked questions
What is a proof coin?
A coin struck multiple times with polished dies to produce mirrored fields and frosted detail, individually packaged and usually issued in limited numbers with a certificate.
Is a proof coin worth more than a bullion coin?
It costs more to buy. Whether it sells for more depends on finding a collector buyer, since bullion dealers generally price on metal content.
Should I buy proof or bullion?
Bullion if you want metal for the lowest cost. Proof if you want the object and understand the premium may not be recoverable.
What does brilliant uncirculated mean?
A finish better than standard bullion but without the full proof striking process, usually priced between the two.
Can I clean a proof coin?
No. Cleaning damages the mirrored surface permanently and destroys collector value.
Browse bullion coins
We stock bullion finish coins from the major sovereign mints. See the range, or read about silver coins and gold coins.