Comparison · Minerals vs Metamorphic Rocks
Hematite vs Metaconglomerate
Hematite and Metaconglomerate are easy to confuse. Both sit near Mohs 6, so a scratch test alone will not separate them. Lean on luster, streak and heft instead. Below is a side-by-side comparison of their properties and the quick tests that separate them.
Key differences between Hematite and Metaconglomerate
- Both sit near Mohs 6, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
- Streak color differs: Hematite leaves a red to reddish-brown streak on unglazed porcelain, Metaconglomerate leaves variable by pebbles and matrix.
- Luster is different: Hematite is metallic while Metaconglomerate is dull.
- Hematite feels noticeably heavier for its size (specific gravity 5.3 versus 2.65 for Metaconglomerate).
- They overlap in gray, black, and red, but Metaconglomerate also comes in white and brown.
Hematite vs Metaconglomerate properties
| Property | Hematite | Metaconglomerate |
|---|---|---|
| Type | Minerals | Metamorphic Rocks |
| Mohs hardness | 6 | 6.5 |
| Luster | metallic | dull |
| Streak | Red to reddish-brown | Variable by pebbles and matrix |
| Transparency | opaque | opaque |
| Specific gravity | 5.3 | 2.65 |
| Crystal system | trigonal | varies |
| Common colors | Metallic Gray, Black, Red | Gray, White, Tan, Red, Brown, Black |
| Rarity | common | uncommon |
| Typical specimen value | $2–$50+ | $1–$75+ |
Which is more valuable?
Typical specimens of Hematite and Metaconglomerate 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 Metaconglomerate
Metaconglomerate is a metamorphosed conglomerate with rounded pebbles or cobbles in a recrystallized matrix. Pebbles may appear stretched, flattened, or locked into a hard metamorphic rock.
Hematite vs Metaconglomerate FAQ
Is Hematite the same as Metaconglomerate?
No. Hematite is a mineral while Metaconglomerate is a metamorphic rock. Both sit near Mohs 6, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
How can you tell Hematite from Metaconglomerate?
Both sit near Mohs 6, so a scratch test alone will not separate them. Lean on luster, streak and heft instead. Streak color differs: Hematite leaves a red to reddish-brown streak on unglazed porcelain, Metaconglomerate leaves variable by pebbles and matrix. Luster is different: Hematite is metallic while Metaconglomerate is dull.
Which is harder, Hematite or Metaconglomerate?
Metaconglomerate is harder: Mohs 6.5 against Mohs 6 for Hematite.
Which is more valuable, Hematite or Metaconglomerate?
Typical specimens of Hematite and Metaconglomerate trade in a similar range, around $10.
