mineral

Banded Calcite

Calcite (Calcium Carbonate, CaCO3)

Hardness: 3 on Mohs scale. Color: Pale yellow, creamy white with tan/grey bands. Luster: Vitreous to waxy. Crystal Structure: Trigonal. Cleavage: Perfect rhombohedral. Specific Gravity: 2.71.

Hardness: 3 on Mohs scale
Color: Pale yellow, creamy white with tan/grey bands
Luster: Vitreous to waxy

Identified June 20, 2026More mineral →

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Physical properties

Hardness: 3 on Mohs scale. Color: Pale yellow, creamy white with tan/grey bands. Luster: Vitreous to waxy. Crystal Structure: Trigonal. Cleavage: Perfect rhombohedral. Specific Gravity: 2.71.

Formation & geological history

Formed through chemical precipitation from calcium-rich solutions in sedimentary environments like caves (stalactites/stalagmites) or hot springs (travertine). Common in various geological ages ranging from Precambrian to Holocene.

Uses & applications

Used primarily for ornamental purposes, lapidary carvings, metaphysical collecting, and as a source of lime in chemical industries. High-grade specimens are used in jewelry as cabochons.

Geological facts

Calcite will react and fizz (effervesce) when it comes into contact with a weak acid like vinegar. It is one of the most common minerals on Earth's crust and is the main component of limestone and marble.

Field identification & locations

Identify by its relative softness (scratched by a copper penny or steel knife) and rhombohedral cleavage. Look for distinctive banding patterns associated with layered growth. Commonly found in Mexico, Brazil, and the USA.