1/20 oz Gold Libertad 1993

Found a tiny gold Mexican coin marked "1/20 Onza" dated 1993? Good news and a reality check in one line: it is real gold, so it always has a value floor tied to the gold spot price, but at 1.58 grams that floor is small. In 2026, a circulated example trades close to its melt value, roughly the price of about 1/20 of a troy ounce of gold, while a certified high-grade piece can bring a modest premium on top.

This is the smallest coin in the Onza Libertad ("Libertad ounce") series, the pure-gold bullion line the Mexican Mint (Casa de Moneda de México) has produced every year since 1981 for collectors and investors. Think of it as Mexico's answer to the American Gold Eagle or the Canadian Maple Leaf. The 1/20 ounce is the fractional baby of the family.

What you actually have

Here are the exact specs. Use them to confirm your coin is genuine before you believe any price.

Spec	Value
Denomination	1/20 Onza (troy ounce) of gold
Gold content	.999 fine (pure gold)
Weight	1.58 grams
Diameter	12.99 mm
Edge	Reeded
Year	1993 (single year for this exact issue)
Mint	Casa de Moneda de México

The front (obverse) shows the Mexican National Coat of Arms surrounded by the historic coats of arms of Mexico. The back (reverse) shows the Winged Victory (the "Ángel de la Independencia" statue in Mexico City) with the Popocatépetl and Iztaccíhuatl volcanoes behind her. That reverse design is the signature of the whole Libertad line.

Is the 1993 rare or worth a fortune?

Be honest with yourself before you get excited. This is a bullion coin, not a rare date. Its value is driven mostly by the gold inside it, not by scarcity. The 1993 belongs to the original gold die type used from 1981 to 1995, which Mexican collectors nickname the "cuño gordita" (roughly, the "chubby die"). It is collectible, but it is not a legendary key date.

The official mintage for this specific fractional issue is not published by the Bank of Mexico, which usually means it came out in limited numismatic sets or a small run. Low documented mintage can help a coin's collector value, but with a piece this small the gold value still dominates. Do not let an online seller quote you "thousands of dollars" for an average 1993 1/20 oz. That is not what the market pays.

What it is worth in USD

Because it contains 1.58 grams of pure gold (about 0.0508 troy ounces), the floor is easy to estimate: multiply the current gold spot price per troy ounce by about 0.0508. Dealers pay a bit under that for scrap-style buys and charge a bit over it retail.

• Circulated or lightly worn: close to melt value, usually a small premium over the gold content.
• Uncirculated (BU): melt value plus a modest bullion premium, since fractional gold carries higher premiums than full-ounce coins.
• Certified MS-65 or higher (NGC or PCGS): the strongest premium, appealing to collectors who want the 1981 to 1995 type in top grade.

For an exact figure on your coin, weigh it, confirm the 1.58 g / 12.99 mm specs, and price it against today's gold spot. If it grades high, professional certification can add real money.

The myth to ignore

A small old gold coin does not automatically mean a windfall. Plenty of listings tag common Libertad fractionals as ultra-rare. The 1/20 oz Libertad is a legitimate, beautiful pure-gold coin with a guaranteed buyer at any time, but its main value is metal, not mystery. Treat the melt figure as your baseline and only pay a collector premium for verified, graded quality.

How to tell if yours is genuine

Weight is the giveaway. A real 1/20 oz Libertad weighs 1.58 grams and measures 12.99 mm. Fake gold coins, often lower-purity pieces from overseas, almost never hit both numbers at once. If your coin is off on weight or diameter, it is not genuine.

Before paying real money for one, get it checked. For anything you plan to buy or sell above bullion value, certification by NGC or PCGS is the definitive insurance: those slabs confirm authenticity and lock in the grade.

Where to sell it

Since this is a precious-metal coin, sell where the price tracks gold spot and where the buyer will handle it in person.

• A verified numismatic shop from the Pesoteca directory will weigh and appraise it on the spot, no middleman markup.
• The Pesoteca buy-and-sell forum connects you directly with collectors.
• Photograph the obverse, reverse, and edge, and check the price range on this page before you accept an offer. Do not dump it to the first bidder on social media.

If you think you have a striking error (off-center, die rotation, doubling), post clear photos in the Pesoteca forum so the community can verify it. Most "errors" circulating online are post-mint damage, not factory errors, but a genuine one can raise the value.

Got one in your inherited box? Post its weight and a photo of the edge in the forum and we will help you tell melt value from collector value.

This piece is a 1/20 oz gold Onza Libertad struck in 1993 in the regular finish (bullion satin). The series was born by decree of the DOF on April 8, 1981, and added the 1/2, 1/4, 1/10, and 1/20 fractions from 1991.

Carlos Salinas. Approval of NAFTA by the three congresses, entering into force on January 1, 1994. Average gold spot of 360 dollars per ounce.

Fraction: pure gold 1.555 grams, fineness 0.999, total weight 1.73 grams, diameter 20 millimeters. The 1/20 is the smallest fraction and the gateway to physical gold. It began to be struck in 1991. Premium over spot of 15 to 25 percent, the highest in the family.

Regular (bullion satin): matte-luster fields and satin relief, a single press strike. Wholesale distribution for investment in physical gold, the year's largest mintage and the natural premium reference against spot.

Banxico CM10 does not publish mintages prior to 2000; the data is consulted in Krause (KM#630 to KM#674 depending on year and fraction).

The regular is bought for its gold content with a low premium over spot. Verify weight, diameter, and reeded edge; compare the premium against Banxico Direct before accepting a middleman.