1/4 oz Gold Libertad 2011 Proof

If you found a small gold coin marked "1/4 Onza" with an angel and two volcanoes, you have a 1/4 oz Gold Libertad Proof. The 2011 Proof is worth its gold content at minimum, roughly the value of a quarter ounce of pure gold, plus a collector premium because only 2,000 were struck. That mintage is the reason it can trade well above melt.

The Libertad (say "lee-ber-TAHD") is Mexico's official bullion coin, produced by the national mint and backed by Banco de México (Banxico, the central bank). It comes in silver and gold. This one is the gold 1/4 ounce in Proof finish, meaning mirror-like fields and frosted raised designs, made for collectors rather than circulation.

What you actually have

The coin shows the Winged Victory (Ángel de la Independencia) on one side and Mexico's national coat of arms surrounded by historic emblems on the other. The Proof version has that distinctive contrast: shiny background, matte-looking design. If yours is in an original Banxico case or blister pack, that helps the price.

Specifications

Feature	Detail
Denomination	1/4 Onza (quarter ounce)
Year	2011
Metal	Gold, .999 fine
Weight	9.64 grams (gross)
Gold content	1/4 troy ounce pure gold
Diameter	26.63 mm
Edge	Reeded
Finish	Proof
Mintage	2,000 pieces
Series	Onza Libertad

What it's worth

Two things set the price: the gold and the rarity.

The gold floor. This coin holds a quarter troy ounce of pure gold, so its value can never fall below the melt value of that gold at the current spot price. That floor moves daily with the gold market. When gold is high, the floor is high. This is why a Gold Libertad is never "worth a few dollars": the metal alone is worth hundreds.

The Proof premium. With only 2,000 struck, the 2011 Proof carries a collector premium on top of melt. A clean example in its original Banxico packaging trades above a plain bullion coin of the same weight. Damaged, cleaned, or loose pieces sit closer to the gold value.

Because the gold spot price changes constantly, we don't quote a fixed number here. To price yours: take the current gold spot per ounce, divide by four for the metal floor, then add a premium for the low mintage and Proof condition. Check the by-grade ranges on this page and compare against recent sales before you sell.

Grade decides the premium

Condition drives how much over melt you get. Proof coins are judged on whether the mirror fields and frosted design are intact.

• Original, untouched Proof in Banxico case: full premium over gold value.
• Handled or removed from packaging, light hairlines: modest premium, closer to melt.
• Cleaned, scratched, or spotted: expect the gold value with little or no premium.

Never clean a Proof coin. Wiping the mirror fields destroys the finish and the premium in one pass. Use the coin grading guide to place your piece before you talk price.

Is it rare?

With 2,000 pieces, yes, this is genuinely scarce compared to circulating coins, though not a legendary rarity. The low mintage is real and it supports the premium. Rarity here works together with the gold content: you get a floor from the metal and an upside from the small print run. That combination is what makes fractional Gold Libertads collectible.

How to tell if it's genuine

Gold fakes exist, so verify before you buy or celebrate.

1. Weigh it. Use a jeweler's scale. It should read 9.64 grams gross. Gold is dense; a fake in cheaper metal usually weighs wrong.
2. Measure it. The diameter should be 26.63 mm on a caliper.
3. Check the finish. A real Proof has crisp mirror fields and sharp frosted relief. Flat, mushy, or dull detail is a warning sign.
4. Look at the edge. It should be reeded (fine vertical grooves).
5. Be suspicious of bargains. Any "deal" priced below the coin's gold value is almost certainly not real gold.

If you want certainty, buy graded and slabbed examples from NGC or PCGS, or have your coin authenticated.

Do error coins exist?

Genuine mint errors (off-center strikes, die rotation, doubling) can multiply value if verified. Be honest with yourself: most "errors" people post online are post-mint damage, dings, or corrosion, not factory mistakes. If you think you have a real one, post clear photos on the Pesoteca forum for a second opinion before assuming it's valuable.

Where to sell it

Since this is a precious-metal coin, sell where the buyer will weigh and inspect it in front of you:

• A verified numismatic dealer from the Pesoteca directory, who can value it on the spot against the gold price.
• The Pesoteca buy-and-sell forum, collector to collector.

Before selling, photograph the obverse, reverse, and edge, and know that day's gold spot so you can check any offer against the metal floor. Don't dump it to the first random buyer online for less than its gold is worth.

Have a 2011 Gold Libertad or another fractional gold piece you're trying to price? Post your photos and weight on the Pesoteca forum and let the community help you value it.

This piece is a 1/4 oz gold Onza Libertad struck in 2011 in the Proof finish. The series was created by the DOF decree of April 8, 1981 and added the 1/2, 1/4, 1/10, and 1/20 fractions from 1991 onward.

Felipe Calderón. The year of gold's historic peak (1,895 dollars in September), spot closed at 1,566 dollars per ounce and the FIX at 13.99 pesos amid the European crisis.

Fraction: pure gold 7.776 grams, .999 fineness, total weight 8.64 grams, diameter 27 millimeters. The quarter ounce is the intermediate piece most hunted by those building a complete fractional set. Premium over spot 8 to 15 percent, the middle stretch of the family.

Proof: frosted mirror fields over matte relief, polished dies and multiple strikes. It comes encapsulated with an individual certificate. The Proof mintage is always a fraction of the regular, typically +40 to 100 percent over bullion.

Banxico CM10 (queried 2026-05-27) records 428 pieces against 1,523 pieces in the regular version of the same year. The difference explains the price gap between variants.

The Proof is hunted for a complete fractional set and for the certificate with original capsule. When buying side by side, check the capsule for scratches, the certificate tied to the piece, and compare the premium against the regular of the same year before dealing with a middleman.