Kolbeckite
A variety of Minerals

What is Kolbeckite?
Kolbeckite (scandium phosphate dihydrate) is a mineral with formula: ScPO4·2H2O. It was discovered originally at Schmiedeberg, Saxony, Germany in 1926 and is named after Friedrich L. W. Kolbeck, a German mineralogist. Kolbeckite is usually found as small clusters of crystals associated with other phosphate minerals.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Kolbeckite 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.
Kolbeckite Localities Map
See where Kolbeckite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Colourless, light yellow; when impure: cyan-blue, blue-gray, apple-green
- Hardness (Mohs)
- 3 - 5
- Density
- 2.35 g/cm³
Chemical Properties
- Chemical Formula
- ScPO4 · 2H2O
- Elements
- H, O, P, Sc
Also Known As

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Kolbeckite FAQs
How do I identify Kolbeckite?
Kolbeckite can be identified by its hardness of 3 - 5 on the Mohs scale, Colourless color. Look for these key characteristics when examining specimens.
What color is Kolbeckite?
Kolbeckite typically appears in Colourless, light yellow; when impure: cyan-blue, blue-gray, apple-green. Color can vary depending on impurities and formation conditions.
How hard is Kolbeckite?
Kolbeckite has a hardness of 3 - 5 on the Mohs scale. This makes it a soft mineral that can be scratched easily.


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