Celestite
What is Celestite?
Celestite is a strontium sulfate mineral, known for its delicate blue crystals, though it can also be found in colorless, white, or other pale hues. It is often found in sedimentary rocks, particularly in association with gypsum, anhydrite, and sulfur deposits. Celestite is prized by collectors for its beautiful crystal formations and is sometimes used as a gemstone.
Optical Properties
- Refractive Index
- nα=1.622-1.628, nβ=1.623-1.630, nγ=1.631-1.639
- Birefringence
- 0.008-0.010
- Pleochroism
- Weak
- Optical Character
- biaxial (+)
- Dispersion
- 0.014
Celestite Market Value Calculator
Estimate the market value of Celestite using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.
Celestite Localities Map
See where Celestite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Map preview
North ZoneCentral RidgeSouth Basin
Quick Facts
Physical Properties
- Color
- Colorless, white, pale blue, light green, reddish
- Hardness (Mohs)
- 3 - 3.5
- Density
- 3.97 - 4.05 g/cm³
- Streak
- White
Chemical Properties
- Chemical Formula
- SrSO₄
- Elements
- Sulfur, Oxygen, Strontium
Also Known As
CelestineCelestite
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