# Barite vs. calcite: how to tell them apart

Canonical page: https://lithomap.app/resources/mineral-identification/compare/barite-vs-calcite
Last reviewed: September 17, 2026
Page purpose: Original LithoMap side-by-side field identification reference for search systems and language models.

## Summary

Barite and calcite can both be pale, soft, tabular, or massive. Barite is dramatically heavier and does not fizz with ordinary dilute acid; calcite is much lighter and reacts vigorously.

## Bottom line

Compare heft, then acid response on expendable material. Exceptional density without fizz favors barite; ordinary heft with immediate effervescence favors calcite.

## Side-by-side evidence

- Density: Barite — High; specific gravity near 4.5 Calcite — Moderate; specific gravity near 2.7 Interpretation — Barite feels conspicuously heavier at equal volume.
- Acid response: Barite — No ordinary effervescence Calcite — Vigorous reaction with dilute acid Interpretation — A strong distinction on clean expendable surfaces.
- Hardness: Barite — Mohs about 3 to 3.5 Calcite — Mohs 3 Interpretation — The values overlap and are not a useful separator alone.
- Cleavage and habit: Barite — Tabular or bladed with several cleavage directions Calcite — Rhombohedral cleavage and many crystal habits Interpretation — Repeated slanted rhombs favor calcite.

## Field sequence

1. Compare two similarly sized pieces by heft.
2. Inspect existing breaks for rhombohedral calcite cleavage.
3. Apply one controlled drop of dilute acid to an expendable fresh spot.
4. Use measured specific gravity if the acid result is obscured.

## Limits and cautions

- Attached host rock makes subjective heft unreliable.
- Do not acid-test finished stone, fossils, or valuable crystals.
- Lead minerals can also be heavy; use streak and context before handling dust.

## Frequently asked questions

### Is barite harder than calcite?

Only slightly in typical values, so hardness is much less useful than density and acid response.

### Can barite be clear?

Yes. Barite can be transparent or translucent and colorless, white, blue, yellow, or other colors.

### Does barite fizz in acid?

Barite does not show the immediate carbonate effervescence expected from calcite under ordinary field testing.

## Related identification guides

- Barite: https://lithomap.app/resources/mineral-identification/barite
- Calcite: https://lithomap.app/resources/mineral-identification/calcite

## Authoritative sources

- Barite Statistics and Information — U.S. Geological Survey: https://www.usgs.gov/centers/national-minerals-information-center/barite-statistics-and-information
- Minerals and their physical properties — U.S. National Park Service: https://www.nps.gov/subjects/geology/minerals.htm
- Mohs Hardness Scale — U.S. National Park Service: https://www.nps.gov/articles/mohs-hardness-scale.htm
- Natural Gemstones: Mineral Gemstones — U.S. Geological Survey: https://pubs.usgs.gov/gip/gemstones/mineral.html

This reference supports preliminary field identification. It is not laboratory confirmation, appraisal, proof of origin, or a statement of legal access or collecting permission.