mineral

Yellow calcite specimen

Calcite (calcium carbonate, CaCO₃)

AI-generated identification · may be incorrect

Likely pale honey-yellow calcite with a dull-to-pearly luster and granular or cleavage-controlled texture. Mohs hardness 3, excellent rhombohedral cleavage, trigonal crystal system, and specific gravity about 2.71; the image alone cannot confirm exact identification.

Identified August 29, 2026More mineral →

Explore Yellow calcite specimen in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Calcite commonly forms from hydrothermal fluids, limestone alteration, or precipitation in cavities and caves. Its age depends on the host deposit, ranging from recent cave growth to ancient sedimentary or hydrothermal systems.

Uses & applications

Used industrially in cement, lime, agricultural soil treatment, and chemical production; attractive transparent or well-crystallized specimens are collected. This irregular piece has modest decorative value.

Geological facts

Calcite effervesces vigorously with dilute hydrochloric acid and can show strong birefringence. Yellow coloration may result from iron or other trace impurities.

Field identification & locations

Test a concealed spot with dilute acid, check for rhombohedral cleavage, and distinguish it from harder quartz, which does not react with acid. Common worldwide, especially in limestone regions and hydrothermal veins.