50 Pesos 1982 (Coyolxauhqui): Value & Facts

If you inherited or found a 1982 Mexican 50 pesos coin with the round stone carving of a woman on the back, here is the honest answer: it is a common circulation coin. In worn condition it is worth about a dollar or two, and even a crisp uncirculated example rarely tops 10 to 15 dollars. It is not the silver 50 pesos, and it is not a rare date.

That carving is the Coyolxauhqui (koh-yol-SHAOW-kee), the Aztec moon goddess whose massive stone disk was unearthed in 1978 next to the Templo Mayor in Mexico City. Mexico put her image on this coin, which is why so many people assume it must be valuable. In 2026, the market still treats it as a low-cost collectible, not a payday.

What you actually have

This is a base-metal coin, not silver or gold. It is struck in cupronickel, an alloy of copper and nickel with no precious-metal content and no melt value to speak of. Here are the exact specs so you can confirm your piece:

• Metal: Cupronickel (copper-nickel alloy, no silver)
• Weight: 19.94 grams
• Diameter: 35.01 mm
• Edge: Reeded (grooved)
• Mint: Casa de Moneda de México (the Mexican Mint)
• Reverse design: The Coyolxauhqui monolith

It is a large, heavy coin, so it feels substantial in the hand. That heft fools a lot of people into thinking it is silver. It is not.

Is it worth money?

Mostly no, and here is why. Mexico issued this denomination through the 1980s, a decade of high inflation that pushed coin face values higher and higher until the 1992 currency reform lopped three zeros off the peso. Millions of these circulated. Survivors are everywhere, which keeps prices low.

Where it changes is condition. A coin worn smooth from years in cash registers is worth pocket change to a collector. An uncirculated example, where every detail of the Coyolxauhqui carving is still sharp and the surfaces have full mint luster, is what buyers actually pay up for.

These are collector ranges for genuine, undamaged coins. A common date in average shape will not clear even those low numbers at a dealer, because the dealer has to resell it.

The coin people confuse this with

Here is the mix-up that sends people looking. Mexico also made a 50 pesos gold coin, the famous Centenario, first struck in 1921. That one contains 37.5 grams of pure gold and is worth thousands of dollars at bullion value alone. The 1982 cupronickel 50 pesos shares only the number 50. Different metal, different era, completely different value. If your coin is silver-gray, magnetic-ish and light on precious content, it is the cupronickel type covered here, not gold.

There is also a silver 50 pesos minted earlier in Mexican history. Again, not this coin. Check the metal and the design before you get your hopes up.

How to check what yours is worth

1. Confirm it is genuine. Weigh it on a jewelry scale (should be 19.94 g) and measure the diameter with calipers (35.01 mm). Fakes usually miss the weight or diameter, show flat, mushy relief, or have off colors. The edge should be evenly reeded.
2. Grade the condition. Look at the raised details of the Coyolxauhqui carving. Full sharp detail and shiny, mark-free fields mean uncirculated. Softened detail and dull surfaces mean circulated.
3. Watch for real mint errors. Genuine, verifiable strike errors (off-center strikes, die rotation, doubled dies) can multiply the value. But most "errors" people post online are post-mint damage, dings, scratches or corrosion, which add nothing. If you think you have a real one, get it looked at before you assume.
4. Do not clean it. Cleaning a coin strips the luster and cuts what a collector will pay.

Where to sell it

For a common coin like this, keep it simple. A verified dealer in the Pesoteca shop directory can value it on the spot without the markup a middleman adds. Collector-to-collector, the Pesoteca buy-and-sell forum is where you reach people who actually want the type. Photograph the front, back and edge, and match the specs against the table above before you list anything. Do not dump it on the first social-media offer.

Realistically, a single worn 1982 fifty pesos is not worth a special trip. Where it earns its keep is as part of a type set of 1980s Mexican circulation coinage, or as a clean uncirculated example a collector needs to finish a run.

Got a whole box of old Mexican coins and not sure which ones matter? Post clear photos in the Pesoteca forum and let the community tell you which pieces are worth setting aside.

Mexican circulating peso coins from the second half of the 20th century were struck in alloys that changed according to the cost of the metals and inflationary pressures: .720 silver in the $1, $5, $10, $25 denominations during the 1940s-50s; cupronickel starting in the 1970s; aluminum bronze and stainless steel in the 1980s; pieces with historical figures (Hidalgo, Cuauhtemoc, Juarez, Madero) in the late 1980s just before the transition to Nuevos Pesos in 1992. 1982 corresponds to the period when this variant was in circulation.