Comparison · Minerals
Calcite vs Halite
Calcite and Halite are easy to confuse because both are minerals. 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 Halite
- Both sit near Mohs 3, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
- Calcite feels noticeably heavier for its size (specific gravity 2.7 versus 2.1–2.2 for Halite).
- Hold a thin edge to the light: Calcite is transparent, Halite is Transparent to translucent.
- They overlap in clear, blue, and pink, but Calcite also comes in yellow, orange, and green and Halite also comes in gray.
- Well-formed crystals give it away: Calcite is trigonal, Halite is Isometric.
Calcite vs Halite properties
| Property | Calcite | Halite |
|---|---|---|
| Type | Minerals | Minerals |
| Mohs hardness | 3 | 2–2.5 |
| Luster | vitreous | Vitreous |
| Streak | White | White |
| Transparency | transparent | Transparent to translucent |
| Specific gravity | 2.7 | 2.1–2.2 |
| Crystal system | trigonal | Isometric |
| Common colors | Colorless, White, Yellow, Orange, Blue, Green, Pink | Colorless, White, Pink, Blue, Gray |
| Rarity | common | common |
| Typical specimen value | $2–$100+ | $2–$150+ |
Which is more valuable?
Halite is usually the more valuable of the two: a typical collector specimen runs about $20 against $15 for Calcite, and premium Halite can reach $150 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 Halite
Halite is naturally occurring sodium chloride, NaCl, the mineral form of common table salt, and one of the few minerals people regularly taste-test in the field. It crystallizes in the isometric system with perfect cubic cleavage in three directions at right angles, producing sharp, blocky crystals. Halite forms through the evaporation of saline water, making it a defining evaporite mineral.
Calcite vs Halite FAQ
Is Calcite the same as Halite?
No. Both are minerals, but they are distinct species 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 Calcite from Halite?
Both sit near Mohs 3, so a scratch test alone will not separate them. Lean on luster, streak and heft instead. Calcite feels noticeably heavier for its size (specific gravity 2.7 versus 2.1–2.2 for Halite). Hold a thin edge to the light: Calcite is transparent, Halite is Transparent to translucent.
Which is harder, Calcite or Halite?
Calcite is harder: Mohs 3 against Mohs 2–2.5 for Halite.
Which is more valuable, Calcite or Halite?
Halite is usually the more valuable of the two: a typical collector specimen runs about $20 against $15 for Calcite, and premium Halite can reach $150 or more.
