9.8 wt% Nickel in Aletai: How the Iron-Nickel Ratio Affects How It Wears

Aletai’s 9.8 wt% nickel is the single number that makes it what it is — and it shapes how a piece behaves on the body. The honest version has two halves: the nickel gives the metal its Widmanstätten pattern and real structural toughness, while still leaving it a reactive iron that needs a little care. (This is about how the material wears, not about nickel allergy — that is a separate question, covered in meteorite jewelry and nickel allergy.)

Why 9.8% is the pattern-forming range

Nickel content is what sorts iron meteorites into classes. Below roughly 6% nickel, the metal forms a single structure with no Widmanstätten pattern — a hexahedrite. Above roughly 16%, it forms a different structure that also shows no visible pattern — an ataxite. In between, the octahedrite range, the kamacite-and-taenite intergrowth produces the pattern. At 9.8%, Aletai sits squarely in that range, which is why its bands are visible at all; their width, 0.9–1.4 mm, places it on the coarse–medium boundary of the classification.

What the nickel does for durability

Nickel makes iron tougher and more stable than it would be on its own. A pure-iron object is softer and oxidises more readily; the iron-nickel alloy in Aletai is harder and holds its form well, which is part of why it stands up to daily wear as jewelry rather than sitting in a specimen case.

What the nickel doesn’t do

Here is the part worth being honest about: 9.8% nickel is not enough to make the metal corrosion-proof. Iron-nickel alloys only develop a genuinely stable, self-protecting surface at much higher nickel levels — far above anything found in a pattern-bearing meteorite. So Aletai stays reactive: when chloride and moisture reach it, it can oxidise (the chemistry is in why Aletai rusts). That is not a defect; it is simply what a 9.8%-nickel iron is, and it is why each piece is maintained with Renaissance Wax rather than left bare.

So how does it wear?

Put together: structurally tough, chemically reactive. Worn with the simple care any iron meteorite needs — kept dry, wiped down, re-waxed on a cycle (Materials & Care) — a 9.8%-nickel Aletai piece holds up well over years. The nickel ratio that makes the pattern possible is the same one that asks for that care. You don’t get one without the other.

Frequently Asked Questions

Why does Aletai meteorite have 9.8% nickel?

It is the natural composition of this iron meteorite, and it places Aletai in the octahedrite range (roughly 6–14% nickel) that produces a visible Widmanstätten pattern. Lower nickel gives no pattern (a hexahedrite); much higher nickel also gives no visible pattern (an ataxite).

Does the nickel make Aletai corrosion-resistant?

No. Iron-nickel alloys only form a genuinely stable, self-protecting surface at much higher nickel levels than any pattern-bearing meteorite has. At 9.8%, Aletai is structurally tough but still a reactive iron, which is why it is maintained with Renaissance Wax.

Is 9.8% nickel durable enough for everyday jewelry?

Structurally, yes — the iron-nickel alloy is harder and more stable than pure iron and stands up to daily wear. It does need basic care to stay protected from moisture and chloride, but it is not fragile.

Is the nickel in meteorite jewelry a problem for allergies?

That is a separate question from durability. Aletai does contain natural nickel, so it is not recommended for nickel-sensitive wearers; the allergy side is covered in our dedicated guide.