Comparison · Sedimentary Rocks
Caliche vs Dolostone
Caliche and Dolostone are easy to confuse because both are sedimentary rocks. Both sit near Mohs 3, 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 Caliche and Dolostone
- Both sit near Mohs 3, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
- Streak color differs: Caliche leaves a white to pale tan streak on unglazed porcelain, Dolostone leaves white.
Caliche vs Dolostone properties
| Property | Caliche | Dolostone |
|---|---|---|
| Type | Sedimentary Rocks | Sedimentary Rocks |
| Mohs hardness | 3 | 3.5 |
| Luster | dull | dull |
| Streak | White to pale tan | White |
| Transparency | opaque | opaque |
| Specific gravity | 2.4 | 2.85 |
| Crystal system | varies | varies |
| Common colors | White, Cream, Tan, Gray, Brown | Tan, Gray, White, Cream, Brown |
| Rarity | common | common |
| Typical specimen value | $1–$75+ | $1–$75+ |
Which is more valuable?
Typical specimens of Caliche and Dolostone trade in a similar range, around $10.
About Caliche
Caliche is a hardened calcium carbonate-rich soil or sediment layer, also called calcrete or hardpan, common in arid and semi-arid regions.
About Dolostone
Dolostone is a carbonate sedimentary rock composed mostly of the mineral dolomite. It often resembles limestone but may react more weakly with dilute acid.
Caliche vs Dolostone FAQ
Is Caliche the same as Dolostone?
No. Both are sedimentary rocks, but they are distinct rock types with different hardness, streak or luster. Both sit near Mohs 3, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
How can you tell Caliche from Dolostone?
Both sit near Mohs 3, so a scratch test alone will not separate them. Lean on luster, streak and heft instead. Streak color differs: Caliche leaves a white to pale tan streak on unglazed porcelain, Dolostone leaves white.
Which is harder, Caliche or Dolostone?
Dolostone is harder: Mohs 3.5 against Mohs 3 for Caliche.
Which is more valuable, Caliche or Dolostone?
Typical specimens of Caliche and Dolostone trade in a similar range, around $10.
