Comparison · Metals & Alloys
Brass vs Zinc
Brass and Zinc are easy to confuse because both are metals & alloys. Brass is harder (Mohs 3.5) than Zinc (Mohs 2.5), so Brass will scratch Zinc and not the other way round. A copper coin (Mohs 3.5) scratches it, but a fingernail does not. Below is a side-by-side comparison of their properties and the quick tests that separate them.
Key differences between Brass and Zinc
- Brass is harder (Mohs 3.5) than Zinc (Mohs 2.5), so Brass will scratch Zinc and not the other way round. A copper coin (Mohs 3.5) scratches it, but a fingernail does not.
- Streak color differs: Brass leaves a yellow-gold to brass streak on unglazed porcelain, Zinc leaves gray.
- Both look metallic, so compare color, tarnish and weight rather than shine.
- Brass feels noticeably heavier for its size (specific gravity 8.5 versus 7.14 for Zinc).
Brass vs Zinc properties
| Property | Brass | Zinc |
|---|---|---|
| Type | Metals & Alloys | Metals & Alloys |
| Mohs hardness | 3.5 | 2.5 |
| Luster | metallic | metallic |
| Streak | Yellow-gold to brass | Gray |
| Transparency | opaque | opaque |
| Specific gravity | 8.5 | 7.14 |
| Crystal system | varies | varies |
| Common colors | Yellow gold, Brass yellow, Brown, Tarnished gold | Bluish silver, Gray, Dull silver |
| Rarity | common | common |
| Typical specimen value | $1–$150+ | $1–$100+ |
Which is more valuable?
Brass is usually the more valuable of the two: a typical collector specimen runs about $15 against $10 for Zinc, and premium Brass can reach $150 or more.
About Brass
Brass is a yellow-gold copper and zinc alloy often used in hardware, decorative objects, instruments, keys, fittings, and jewelry findings.
About Zinc
Zinc is a bluish-silver metal used in galvanizing steel, die-cast objects, batteries, coins, hardware, and brass production.
Brass vs Zinc FAQ
Is Brass the same as Zinc?
No. Both are metals & alloys, but they are distinct species with different hardness, streak or luster. Brass is harder (Mohs 3.5) than Zinc (Mohs 2.5), so Brass will scratch Zinc and not the other way round. A copper coin (Mohs 3.5) scratches it, but a fingernail does not.
How can you tell Brass from Zinc?
Brass is harder (Mohs 3.5) than Zinc (Mohs 2.5), so Brass will scratch Zinc and not the other way round. A copper coin (Mohs 3.5) scratches it, but a fingernail does not. Streak color differs: Brass leaves a yellow-gold to brass streak on unglazed porcelain, Zinc leaves gray. Both look metallic, so compare color, tarnish and weight rather than shine.
Which is harder, Brass or Zinc?
Brass is harder: Mohs 3.5 against Mohs 2.5 for Zinc.
Which is more valuable, Brass or Zinc?
Brass is usually the more valuable of the two: a typical collector specimen runs about $15 against $10 for Zinc, and premium Brass can reach $150 or more.
