mineral

Botryoidal calcite specimen

Calcite, CaCO₃, with possible dolomite or other carbonate matrix

AI-generated identification · may be incorrect

Cream-to-tan, rounded botryoidal crystal aggregates with a pearly to vitreous luster; calcite has Mohs hardness 3, trigonal crystal structure, rhombohedral cleavage, and specific gravity about 2.7.

Identified October 13, 2026More mineral →

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Physical properties

Cream-to-tan, rounded botryoidal crystal aggregates with a pearly to vitreous luster; calcite has Mohs hardness 3, trigonal crystal structure, rhombohedral cleavage, and specific gravity about 2.7.

Formation & geological history

Likely precipitated from mineral-rich groundwater in a cavity or fracture, forming rounded coatings and crystal growths. Its geological age cannot be determined from the image.

Uses & applications

Collected as a mineral specimen and occasionally used for decoration; calcite is also used in cement, lime, and construction aggregates.

Geological facts

Calcite effervesces in dilute hydrochloric acid, especially when powdered. The visible rounded forms are characteristic of botryoidal growth.

Field identification & locations

Look for soft hardness, rhombohedral cleavage, and acid reaction; similar cream-colored specimens occur in caves and carbonate-hosted veins worldwide. Image-based identification is uncertain, and the specimen may include other minerals.