mineral
Aragonite Star Cluster
Aragonite (CaCO3)
AI-generated identification · may be incorrectHardness: 3.5-4 (Mohs), Color: reddish-brown to orange, Luster: Vitreous to resinous, Crystal Structure: Orthorhombic (often forming pseudo-hexagonal twinned crystals), Cleavage: Distinct in one direction.
- Hardness
- 3
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Physical properties
Hardness: 3.5-4 (Mohs), Color: reddish-brown to orange, Luster: Vitreous to resinous, Crystal Structure: Orthorhombic (often forming pseudo-hexagonal twinned crystals), Cleavage: Distinct in one direction.
Formation & geological history
Found in the oxidation zones of ore deposits and sedimentary environments. Many of these reddish star clusters are found in clay beds near Aragon, Spain, or in Morocco.
Uses & applications
Primarily used as metaphysical stones, decorative collector specimens, and in aquariums to buffer water pH.
Geological facts
Aragonite is chemically identical to calcite but has a different crystal structure. It is also the primary component of many sea shells and pearls.
Field identification & locations
Identify by its unique twinned, radiating hexagonal prisms that create a starburst shape. Commonly found in Spain, Morocco, and Mexico.
