Comparison · Minerals vs Carbonates
Calcite vs Rhodochrosite
Calcite and Rhodochrosite are easy to confuse. 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 Calcite and Rhodochrosite
- Both sit near Mohs 3, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
- Rhodochrosite feels noticeably heavier for its size (specific gravity 3.65 versus 2.7 for Calcite).
- Hold a thin edge to the light: Calcite is transparent, Rhodochrosite is translucent.
- They overlap in orange and pink, but Calcite also comes in clear, yellow, blue, and green and Rhodochrosite also comes in red and brown.
Calcite vs Rhodochrosite properties
| Property | Calcite | Rhodochrosite |
|---|---|---|
| Type | Minerals | Carbonates |
| Mohs hardness | 3 | 3.75 |
| Luster | vitreous | vitreous |
| Streak | White | White |
| Transparency | transparent | translucent |
| Specific gravity | 2.7 | 3.65 |
| Crystal system | trigonal | trigonal |
| Common colors | Colorless, White, Yellow, Orange, Blue, Green, Pink | Pink, Rose red, Red, Orange, Brown |
| Rarity | common | uncommon |
| Typical specimen value | $2–$100+ | $15–$900+ |
Which is more valuable?
Rhodochrosite is usually the more valuable of the two: a typical collector specimen runs about $120 against $15 for Calcite, and premium Rhodochrosite can reach $900 or more.
About Calcite
Calcite is one of the most common minerals on Earth, found in sedimentary, metamorphic, and igneous rocks. It's the primary component of limestone and marble.
About Rhodochrosite
Rhodochrosite is a manganese carbonate famous for its rose-pink to deep red color. It occurs as transparent rhombohedral crystals as well as banded pink-and-white masses, and it is popular with both collectors and lapidaries.
Calcite vs Rhodochrosite FAQ
Is Calcite the same as Rhodochrosite?
No. Calcite is a mineral while Rhodochrosite is a carbonate. 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 Calcite from Rhodochrosite?
Both sit near Mohs 3, so a scratch test alone will not separate them. Lean on luster, streak and heft instead. Rhodochrosite feels noticeably heavier for its size (specific gravity 3.65 versus 2.7 for Calcite). Hold a thin edge to the light: Calcite is transparent, Rhodochrosite is translucent.
Which is harder, Calcite or Rhodochrosite?
Rhodochrosite is harder: Mohs 3.75 against Mohs 3 for Calcite.
Which is more valuable, Calcite or Rhodochrosite?
Rhodochrosite is usually the more valuable of the two: a typical collector specimen runs about $120 against $15 for Calcite, and premium Rhodochrosite can reach $900 or more.
