Can the 1868 Aluminum Proof Set Be Made Into Jewelry? A Crafter’s Guide to Metal Hardness, Silver Content, and Design Details

Not every coin belongs in a jeweler’s workshop. Let’s dig into the metal composition and durability of this particular piece to see if it truly passes muster for jewelry making.

When I first encountered images of the legendary 1868 aluminum proof sets, my mind immediately split in two directions. The numismatic historian in me stood in awe of their extraordinary rarity and provenance. But the coin ring artisan in me — the one who’s spent years folding and drilling silver Morgan dollars, Walking Liberty halves, and experimental planchets — started analyzing their craftability on pure instinct. Could these remarkable pieces, struck in a metal that was once more valuable than gold, be transformed into wearable art? The answer, as with most things in numismatics, is complicated, fascinating, and ultimately rather definitive.

After years of working hands-on with every type of coin you can imagine — from soft silver to stubborn nickel alloys — I can tell you with absolute confidence that understanding a coin’s metal composition, hardness, and design details before you even pick up a drill is not optional. It’s essential. Let me walk you through everything you need to know about the 1868 aluminum proof sets from a jewelry-making perspective — and why I believe they should stay exactly where they are.

What Exactly Are the 1868 Aluminum Proof Sets?

To evaluate whether these coins are suitable for crafting, we first need to understand what they actually are. In 1868, the United States Mint prepared sets of U.S. coinage struck in aluminum — not as traditional patterns, but as prestige demonstration sets intended to showcase the exotic metal itself. These were statement pieces, meant to illustrate what American coinage could look like if struck in this remarkable, feather-light material.

According to records discussed by numismatic researchers, four sets were traditionally attributed to the Treasury Department, supported by surviving correspondence and internal documents. But additional sets — with unknown or undocumented packaging — have since surfaced, bringing the confirmed total to at least 11, with some estimates reaching as high as 15. One notation in the Chief Coiner’s journal records that the Mint purchased 50 ounces of aluminum at $100, or $2 per ounce, from Victor Bishop. That quantity would have been sufficient to strike all nine originally commissioned sets with material to spare.

Each set contained 16 pieces — one of every denomination from the cent through the Double Eagle — all struck from regular dies in aluminum. These rank among the most coveted possessions in all of American numismatics. When they appear at auction, they command extraordinary prices. The Garrett set, for example, was sold at Heritage in 2013 as a complete 16-piece aluminum pattern proof set, with individual coins graded PR63 to PR67 Cameo by NGC. That sale alone tells you everything about the level of eye appeal and collectibility these pieces command.

The Metal Composition: Pure Silver vs. Pure Aluminum

Here’s where things get critical for anyone even considering these coins for jewelry. Let’s talk about what these coins are actually made of — and why it matters enormously for any crafting project.

Pure Aluminum vs. Silver Coins: A Fundamental Difference

Most coin jewelry on the market today is made from silver coins — typically 90% silver Morgan dollars, Walking Liberty half dollars, or Mercury dimes. Silver has been the benchmark for coin rings for good reason. It’s malleable enough to fold and shape cleanly, durable enough to withstand daily wear, and develops a gorgeous patina over time that collectors and jewelry lovers find deeply appealing.

The 1868 aluminum proof sets, however, are struck in aluminum — not silver. This is a fundamentally different metal with vastly different working properties. According to detailed discussions among numismatic experts, these coins are believed to be struck in pure aluminum, though some scholars have speculated whether the Mint might have requested a specific alloy, as it occasionally did with later legitimate pattern issues.

For jewelry crafting purposes, this distinction is everything. Here’s why:

• Silver content: Zero. These coins contain absolutely no silver. If you’re after the warm, rich luster that silver jewelry provides, aluminum delivers something entirely different — a cool, bright gray appearance that is striking in its own right but completely lacks the depth and warmth of silver.
• Weight: Aluminum is extraordinarily lightweight — roughly one-third the density of silver. A ring made from aluminum would feel almost weightless on the finger. For some wearers, that’s a novelty. For others, it would feel hollow and insubstantial — the opposite of what you want from a piece of handcrafted jewelry.
• Value: While aluminum was genuinely exotic and relatively expensive in 1868, it is now the most abundant metal on Earth. The numismatic value of these coins is astronomical and bears no relation to any bullion or scrap metal value.

The Silver Content Question

I want to address this directly because I know it’s on many collectors’ and crafters’ minds: there is no silver in these coins — none at all. If you’re a jewelry maker who prefers working with silver, whether for its superior workability, its hypoallergenic properties, or its ability to take a brilliant high polish, the 1868 aluminum sets simply will not satisfy those preferences.

That said, aluminum has its own distinct aesthetic charm. The metal has a bright gray to whitish-silver color that, when freshly polished, can be genuinely stunning. In the 19th century, aluminum was displayed at the 1855 Exposition Universelle in Paris, where 12 small ingots were shown to a genuinely astonished public. The metal was so novel, so otherworldly, that it was considered almost magical. This remarkable historical context gives aluminum jewelry a narrative depth that silver simply cannot replicate — a story of industrial ambition and scientific wonder.

Metal Hardness: Can You Actually Craft With It?

This is the question that will ultimately make or break any jewelry project involving aluminum coins. In my years of working with various metals for coin rings, I’ve learned that hardness is the single most important factor determining whether a coin can be successfully folded, drilled, and shaped without cracking, shattering, or deforming unpredictably.

Understanding Aluminum’s Hardness Properties

Pure aluminum is a remarkably soft metal. On the Mohs hardness scale, it rates approximately 2.5 to 3.0 — making it significantly softer than silver coin alloy and only marginally harder than a fingernail, which also rates about 2.5. This softness presents both opportunities and serious challenges for jewelry making:

1. Folding: Aluminum’s softness means it can be folded relatively easily compared to harder metals like nickel or steel. However, pure aluminum is also highly prone to work hardening — meaning it becomes harder and more brittle the more you manipulate it. This can lead to cracking along fold lines if you’re not extremely careful. I’ve seen beautiful projects ruined this way.
2. Drilling: Drilling aluminum requires sharp bits and painstaking technique. Aluminum tends to “gum up” drill bits rather than cutting cleanly, and the thin, soft metal can deform around the bit instead of yielding a clean hole. I’ve found that slow speed with generous lubrication helps, but it’s still far trickier than drilling through silver.
3. Durability for daily wear: This is the dealbreaker. A ring made from pure aluminum would be extremely susceptible to scratching, denting, and deformation. Unlike silver, which develops a characterful, attractive patina over time, aluminum tends to look worn, battered, and neglected very quickly. For any piece of jewelry meant to be worn regularly, this is a significant — perhaps insurmountable — drawback.

Comparing Aluminum to Traditional Coin Ring Metals

Let me put this in practical perspective for fellow crafters. Here’s how aluminum stacks up against the metals I work with most frequently:

• 90% Silver (Morgan Dollar): Excellent for rings. Malleable, durable, takes a beautiful shine, develops an attractive patina. The undisputed gold standard for coin jewelry.
• Clad Copper-Nickel: Harder and more challenging to work, but produces rings with excellent long-term durability. The design details tend to remain sharp over years of wear.
• Nickel (Buffalo Nickel): Very hard and genuinely difficult to fold. Prone to cracking. Not ideal for beginners — or honestly, for most experienced crafters either.
• Pure Aluminum (1868 Proof): Soft and easy to initially shape, but far too soft for practical daily wear. The ring would lose its crisp shape and visual appeal within weeks of regular use. The strike details — the very thing that makes these coins extraordinary — would be the first thing to disappear.

Design Details: What Would a Ring Actually Showcase?

Setting aside the durability concerns for a moment — and assuming you could use the coin as a setting or inlay rather than a fully folded ring — let’s examine what design details would actually be visible and appealing in jewelry form.

The 16 Denominations and Their Design Appeal

The 1868 aluminum proof set spans every denomination from the humble cent to the mighty Double Eagle ($20 gold piece). Each features the standard circulating designs of 1868, which means:

• Cent (Indian Head): The iconic Liberty in a feathered headdress. On a ring, that profile would make a striking, immediately recognizable focal point.
• Nickel (Shield Nickel): The bold, distinctive shield design with rays. Geometric and powerful — excellent for jewelry applications.
• Dime through Half Dollar (Seated Liberty): The classic Seated Liberty design with Liberty seated on a rock, holding a shield and liberty pole. This design has beautiful, intricate detail that translates exceptionally well to jewelry.
• Silver Dollar through Double Eagle (Liberty Head): The elegant Liberty Head design with flowing hair and coronet. Absolutely stunning when rendered in any metal — and the luster of aluminum would give it a distinctive cool-toned beauty.

The “Bright Gray” Aesthetic

One forum contributor noted that the Heritage 2007 sale described the coins as having a “bright gray color” and appearing untoned in photographs. This is characteristic of aluminum — it doesn’t develop the warm golden or rainbow toning that gives silver coins so much of their eye appeal. Instead, aluminum tends to maintain its bright, cool gray appearance, though it can develop a dull oxide layer over time if not properly cared for.

For jewelry purposes, this means an aluminum coin ring would have a distinctly modern-looking aesthetic — quite different from traditional silver coin jewelry. It would be more comparable to white gold or platinum in terms of color, but obviously without the weight, prestige, or intrinsic value of those precious metals.

The Elephant in the Room: Numismatic Value vs. Crafting Value

I would be doing readers a disservice — as both a practicing numistmatist and an experienced crafter — if I didn’t address the most important consideration head-on: these coins are among the rarest and most valuable pieces in all of American numismatics.

What Are These Coins Actually Worth?

The numbers are staggering. When a complete 16-piece 1868 aluminum proof set appears at auction, it commands prices rivaling or exceeding those of the finest gold rarities. Individual coins from these sets — when they can be properly identified and authenticated — carry enormous premiums as well. The Garrett set, sold at Heritage in 2013, was catalogued as an R8 designation, meaning only 1 to 3 examples are known to exist as a complete set.

To put it as bluntly as I can: destroying one of these coins to make a ring would be the numismatic equivalent of burning a Picasso to stay warm. The value destroyed would be measured in the hundreds of thousands — potentially millions — of dollars. The resulting jewelry would have purely artistic value that could never, under any conceivable circumstances, come close to compensating for the loss.

The Market Reality

Even if you were somehow willing to sacrifice the numismatic value, there’s another insurmountable problem: these coins almost never become available at any price that would make crafting remotely practical. As one forum contributor observed, while these sets do appear at auction with some regularity, they are “certainly less impressive when removed from their case and slabbed.” But that aesthetic observation has absolutely no bearing on their market value. The numismatic community prizes these sets regardless of whether they’re displayed in their original cases or encapsulated by third-party grading services.

The original cases themselves are also highly collectible. Records indicate that cases cost $36 each in 1868 — a very significant sum at the time — while John Jay Knox’s sets had cases charged at just $7 each. The combination of coins and original case creates a complete, irreplaceable historical artifact. Dismantling that for jewelry would be, in my considered opinion, nothing short of criminal.

What About Other Aluminum Patterns and Coins?

If the 1868 sets are completely off the table — and they absolutely should be — what about other aluminum numismatic pieces that might be more suitable for jewelry crafting?

The 1867 Aluminum Pattern Nickels

Forum discussions mention that approximately 200 of the 5-cent 1867 coins were struck in aluminum. These are Longacre patterns, not Shield Nickels proper. Given the tiny surviving population, that figure likely represents the entire original mintage. These are also extremely rare and extraordinarily valuable — completely unsuitable for crafting purposes.

The Unique 1855 Seated Half Dollar in Aluminum

This coin has always been shrouded in mystery — it’s the only aluminum pattern known to have been struck before 1867. Some scholars speculate it was created for or inspired by the 1855 Exposition Universelle in Paris, where aluminum was displayed to an astonished world. As a unique specimen, it resides permanently in the National Numismatic Collection and is simply not available for any private use whatsoever.

The 1974 Aluminum Cents

One forum contributor raised the question of the specific alloy used in the proposed 1974 aluminum cents — and this is actually a more interesting question for jewelry makers. The 1974 aluminum cents were struck in an aluminum alloy rather than pure aluminum, which would give them different hardness properties. However, these coins were never officially released, and the few known examples are considered illegal to own under current federal law. So they’re emphatically not a viable option either.

Practical Alternatives for Aluminum Coin Jewelry

If you love the look of aluminum in jewelry but have no desire — and rightfully so — to destroy a priceless numismatic treasure, here are some practical alternatives I’d genuinely recommend:

1. Aluminum tokens and medals: Many beautiful tokens and commemorative medals have been struck in aluminum throughout American history. These are far more affordable and readily available than numismatic rarities, and they offer the same bright, lightweight aesthetic that draws people to aluminum in the first place.
2. Modern aluminum rounds: Several private mints now produce aluminum rounds with attractive, detailed designs. These are specifically made to be affordable and accessible, and they’re perfect for jewelry crafting.
3. Damaged or cull aluminum coins: If you can find aluminum coins that have been damaged or are otherwise numismatically worthless, these could theoretically be suitable candidates. However, truly worthless aluminum coins are exceptionally rare simply because most aluminum coins were produced in small numbers and carefully retained by collectors.
4. Aluminum alloy coins from other countries: Several nations have circulated aluminum or aluminum-alloy coins that are more readily available and affordable. These alloys tend to be significantly harder and more durable than pure aluminum, making them much better suited for jewelry that will actually withstand daily wear.

The Historical Significance: Why These Coins Truly Matter

Before I wrap up, I want to step back entirely from the crafting perspective and appreciate these coins for what they genuinely are: extraordinary artifacts of American technological ambition and monetary history.

A Window Into 19th-Century Metallurgy

The 1868 aluminum proof sets represent a genuinely fascinating moment in Mint history. As forum contributors have discussed in detail, Mint officers understood that aluminum was abundant in nature but extraordinarily difficult to extract in pure form. They recognized that advances in practical metallurgy would eventually make purification easier and production cheaper. Their real goal wasn’t necessarily aluminum coinage for everyday circulation — it was exploring aluminum in combination with silver, copper, and other metals to create wear-resistant alloys suitable for minor coinage.

Meaningful alloy experiments continued into the 1890s, but nothing incorporating aluminum proved superior to the metals already in use. Mint officers and technicians preferred binary alloys because most were straightforward to reprocess within the Mint’s existing operations. And so aluminum remained what it had always been — a scientific curiosity, metallurgically fascinating but practically unsuitable for everyday coinage.

The Price Revolution

The price history of aluminum is itself one of the most remarkable stories in industrial chemistry. Before 1884, aluminum commanded prices in the $500 per pound range — not quite as expensive as gold, but far beyond silver. By 1859, the price had fallen to $40 per pound. By 1867, it was approximately $15 in Europe and $9.00 in the United States. By the time the 1868 sets were being produced, the Mint was paying $2 per ounce to Victor Bishop — which, as one contributor astutely noted, was actually above the prevailing market value at the time.

This price revolution — from precious metal to commonplace material — is one of the defining stories of industrial chemistry. The development of the Hall-Héroult process in 1886 made large-scale aluminum production economically feasible, and by the early 20th century, aluminum had become the cheap, ubiquitous material we know today.

The Nine Sets and Their Remarkable Journey

The documentation surrounding the 1868 aluminum proof sets is remarkably detailed for pieces of this era. We know that an order was received on June 6, 1868, from the Director by A. Thacher, Clerk, for “5 Aluminum setts of the coins of the United States,” to be delivered on or before July 6, 1868. We know that four sets had previously been struck and delivered on an order from the Treasury Department in Washington. We know that at least 11 sets were ultimately produced, with the likely total being around 15.

We also know that these sets have been carefully preserved and passed through the most illustrious collections in American numismatics — including the Garrett collection, the Eric Newman collection, and the Newcomer set. Their appearances at auction are major numismatic events, meticulously catalogued and eagerly anticipated by collectors worldwide. Each sale adds another chapter to a provenance story that stretches back over 150 years.

Conclusion: Admire, Don’t Alter

As a coin ring artisan who has personally examined hundreds of coins for their crafting potential, I can say with complete confidence that the 1868 aluminum proof sets are among the most unsuitable candidates I’ve ever encountered. It’s not that the metal itself is unworkable — aluminum can be shaped, drilled, and polished. It’s that these particular coins are irreplaceable national treasures.

The numismatic value is simply too high. The historical significance is too profound. And frankly, the metal is too soft for any practical jewelry application. A ring made from one of these coins would be a fragile, easily damaged piece that would lose its aesthetic appeal within months of daily wear — while simultaneously destroying an artifact worth a small fortune.

If you’re drawn to the aesthetic of aluminum in jewelry, I wholeheartedly encourage you to explore the many beautiful tokens, medals, and modern rounds available specifically for crafting purposes. These offer the bright, lightweight appearance of aluminum without the ethical catastrophe and financial devastation of destroying a numismatic treasure.

But if you’re a collector or historian who appreciates these magnificent pieces for what they truly are, then the 1868 aluminum proof sets represent something genuinely special: a moment in time when the United States Mint reached toward the future, experimenting with a metal that would eventually transform the modern world. They are prestige pieces, demonstration pieces, and historical artifacts all rolled into one — and they deserve to be preserved exactly as they are.

The next time you see an image of these remarkable sets — whether displayed in their original cases or carefully slabbed by NGC or PCGS — take a moment to appreciate not just their rarity and beauty, but the extraordinary story they tell about American innovation, ambition, and the relentless pursuit of progress. That’s a story worth far more than any ring could ever be.

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