mineral

Banded Calcite (variety Honey Calcite / Chocolate Calcite)

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale; Color: Honey-yellow and dark brown bands; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Hexagonal; Cleavage: Perfect rhombohedral; Specific Gravity: 2.71

Hardness: 3 on Mohs scale
Color: Honey-yellow and dark brown bands
Luster: Vitreous to waxy

Identified March 25, 2026More mineral →

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Physical properties

Hardness: 3 on Mohs scale; Color: Honey-yellow and dark brown bands; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Hexagonal; Cleavage: Perfect rhombohedral; Specific Gravity: 2.71

Formation & geological history

Formed through sedimentary precipitation in limestone caves or hydrothermal environments. This banded variety is often deposited from cold-water springs or as stalagmitic growth where mineral content in the water changes over time, creating distinctive color layers.

Uses & applications

Predominantly used for ornamental carvings, decorative 'worry stones', jewelry beads, and architectural accents. In industrial form, calcite is used in cement, antacids, and as an abrasive.

Geological facts

Calcite is one of the most common minerals on Earth, but the banded honey and chocolate variety is prized for its aesthetic similarity to gemstones like Tiger's Eye. It is known for its high level of double refraction (birefringence), where light passing through it splits into two rays.

Field identification & locations

Identify in the field by its softness (it can be scratched by a copper penny) and its reaction to weak acids (it will fizz/effervesce when exposed to vinegar or HCl). Common locations include Mexico, Utah (USA), and Pakistan.

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