mineral

Calcite (likely honey/yellow calcite)

Calcite, CaCO₃; a carbonate mineral rather than a rock

AI-generated identification · may be incorrect

Pale honey-yellow to cream, translucent, and glassy/pearly with prominent cleavage surfaces. Mohs hardness 3, typically rhombohedral cleavage, vitreous to pearly luster, and specific gravity about 2.71; the photo suggests fractured or cleaved calcite, though crystal form is indistinct.

Identified September 16, 2026More mineral →

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Physical properties

Formation & geological history

Usually forms in limestone and marble, hydrothermal veins, cavities, and carbonate-rich soils. The specimen’s age cannot be determined from the photograph; calcite is common in many ages and settings.

Uses & applications

Used in cement, lime, aggregate, soil treatment, and chemical manufacture; transparent honey calcite is also collected and occasionally cut for ornamental objects.

Geological facts

Calcite effervesces strongly with dilute hydrochloric acid or vinegar, although vinegar may react slowly. It commonly shows double refraction and can be scratched easily with a copper coin or steel knife.

Field identification & locations

The yellow translucent cleavage and local soil setting fit calcite. Near 9.9°N, 124.2°E in Bohol, Philippines, carbonate rocks and limestone are regionally plausible; test an inconspicuous spot with dilute acid and check for fizzing. Avoid confusing it with quartz, which is harder and lacks cleavage.