mineral
Celestite (Blue Celestine)
Celestine (Strontium Sulfate, SrSO4)
Hardness: 3-3.5; Color: Pale blue to sky blue; Luster: Vitreous to pearly; Crystal structure: Orthorhombic; Cleavage: Perfect; Specific Gravity: 3.9-4.0
- Hardness
- 3-3
- Color
- Pale blue to sky blue
- Luster
- Vitreous to pearly
Identified More mineral →
Explore Celestite (Blue Celestine) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 3-3.5; Color: Pale blue to sky blue; Luster: Vitreous to pearly; Crystal structure: Orthorhombic; Cleavage: Perfect; Specific Gravity: 3.9-4.0
Formation & geological history
Formed primarily in sedimentary rocks (dolostone and limestone) through hydrothermal processes or crystallization in evaporate deposits and geodes.
Uses & applications
Primary source of Strontium used in fireworks and tracer bullets. Also popular in gemstone carving, crystal healing collections, and as decorative mineral specimens.
Geological facts
Celestite is known for creating large geode structures; the 'Crystal Cave' in Ohio is the world's largest celestite geode, measuring 30 feet across.
Field identification & locations
Identifiable by its characteristic pale blue color, high density (heaviness), and distinct cleavage. Commonly found in Madagascar, Sicily, and Lake Erie, USA regions.
More like this
Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
Nephrite
Mineral/Rock
Granite
Granite (Phaneritic intrusive igneous rock)
igneous