Greifensteinite
A variety of Minerals
What is Greifensteinite?
Greifensteinite is beryllium phosphate mineral with formula: Ca2Fe5Be4(PO4)6(OH)4·6H2O. It is the Fe dominant member of the roscherite group. It crystallizes in the monoclinic crystal system and typically forms prismatic dark olive green crystals. It was first described in Germany at Greifenstein Rocks, Ehrenfriedersdorf, and was named for the location. At the type locality, it occurs within a lithium-rich pegmatite in miarolitic cavities. It was approved by the International Mineralogical Association in 2002.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Greifensteinite 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.
Quick Facts
Chemical Properties
- Chemical Formula
- Ca2Fe2+5Be4(PO4)6(OH)4 · 6H2O
- Elements
- Be, Ca, Fe, H, O, P
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