What's That Rock?Celestine
Also called: celestite
A delicate pale blue mineral made of strontium sulfate. It forms in crystals and in the hollows of geodes.
How to identify Celestine
- Soft and pale blue
- Tabular or pointed crystals
- Heavy for its size
Often confused with
- Barite
- Blue calcite
- Aquamarinemuch harder
Is Celestine valuable?
Inexpensive to moderate.
Typical retail prices
Collector specimen$20–200each
Typical retail ranges in US dollars, compiled from public dealer and marketplace listings in October 2026. Real prices vary widely with quality, size and origin. This is general information, not an appraisal.
What changes the price
- Color: soft sky blue is the classic; deep blue and clear crystals cost more
- Form and clarity: sharp crystals lining a geode are the prized form (Madagascar)
- Condition: fragile, so chips and cracks cut the price
- Origin: Madagascar and Sicily material is well known
Uses
- Source of strontium, specimens
Care
Fragile. Avoid heat and knocks.
Identifying a stone from a description or a photo is an estimate. Many stones look alike. Ask an expert or a gem lab before you buy, sell or rely on an identification.
Updated October 2026