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
Identified More mineral →
Explore Aragonite Star Cluster in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
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.
More like this
Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Septarian Pebble
Septarian nodule / Concretion
sedimentary