Comparison · Minerals vs Sedimentary Rocks
Hematite vs Ironstone
Hematite and Ironstone are easy to confuse. Hematite is harder (Mohs 6) than Ironstone (Mohs 4), so Hematite will scratch Ironstone and not the other way round. A steel knife blade (Mohs 5.5) scratches it; a copper coin does not. Below is a side-by-side comparison of their properties and the quick tests that separate them.
Key differences between Hematite and Ironstone
- Hematite is harder (Mohs 6) than Ironstone (Mohs 4), so Hematite will scratch Ironstone and not the other way round. A steel knife blade (Mohs 5.5) scratches it; a copper coin does not.
- Streak color differs: Hematite leaves a red to reddish-brown streak on unglazed porcelain, Ironstone leaves brown to reddish brown.
- Luster is different: Hematite is metallic while Ironstone is dull.
- Hematite feels noticeably heavier for its size (specific gravity 5.3 versus 3.2 for Ironstone).
- They overlap in gray, black, and red, but Ironstone also comes in brown and orange.
Hematite vs Ironstone properties
| Property | Hematite | Ironstone |
|---|---|---|
| Type | Minerals | Sedimentary Rocks |
| Mohs hardness | 6 | 4 |
| Luster | metallic | dull |
| Streak | Red to reddish-brown | Brown to reddish brown |
| Transparency | opaque | opaque |
| Specific gravity | 5.3 | 3.2 |
| Crystal system | trigonal | varies |
| Common colors | Metallic Gray, Black, Red | Brown, Red brown, Orange, Dark gray, Black |
| Rarity | common | common |
| Typical specimen value | $2–$50+ | $1–$75+ |
Which is more valuable?
Typical specimens of Hematite and Ironstone trade in a similar range, around $10.
About Hematite
Hematite is the most important iron ore mineral. Its name comes from the Greek word for blood, referring to its red streak.
About Ironstone
Ironstone is an iron-rich sedimentary rock that commonly appears rusty brown, reddish, dark gray, or concretionary.
Hematite vs Ironstone FAQ
Is Hematite the same as Ironstone?
No. Hematite is a mineral while Ironstone is a sedimentary rock. Hematite is harder (Mohs 6) than Ironstone (Mohs 4), so Hematite will scratch Ironstone and not the other way round. A steel knife blade (Mohs 5.5) scratches it; a copper coin does not.
How can you tell Hematite from Ironstone?
Hematite is harder (Mohs 6) than Ironstone (Mohs 4), so Hematite will scratch Ironstone and not the other way round. A steel knife blade (Mohs 5.5) scratches it; a copper coin does not. Streak color differs: Hematite leaves a red to reddish-brown streak on unglazed porcelain, Ironstone leaves brown to reddish brown. Luster is different: Hematite is metallic while Ironstone is dull.
Which is harder, Hematite or Ironstone?
Hematite is harder: Mohs 6 against Mohs 4 for Ironstone.
Which is more valuable, Hematite or Ironstone?
Typical specimens of Hematite and Ironstone trade in a similar range, around $10.
