Fabianite
A variety of Minerals
What is Fabianite?
Fabianite is a borate mineral with the chemical formula CaB3O5(OH). It is colorless and leaves a white streak. Its crystals are monoclinic prismatic. It is transparent and fluorescent. It has vitreous luster. It is not radioactive. Fabianite is rated 6 on the Mohs Scale. It was named for Hans-Joachim Fabian, a German geologist.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Fabianite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Fabianite Localities Map
See where Fabianite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Colourless
- Hardness (Mohs)
- 6
- Density
- 2.788 g/cm³
Chemical Properties
- Chemical Formula
- CaB3O5OH
- Elements
- B, Ca, H, O
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Fabianite FAQs
How do I identify Fabianite?
Fabianite can be identified by its hardness of 6 on the Mohs scale, Colourless color. Look for these key characteristics when examining specimens.
What color is Fabianite?
Fabianite typically appears in Colourless. Color can vary depending on impurities and formation conditions.
How hard is Fabianite?
Fabianite has a hardness of 6 on the Mohs scale. This gives it moderate hardness.
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