Golyshevite
A variety of Minerals
What is Golyshevite?
Golyshevite is a rare mineral of the eudialyte group, with formula Na10Ca3Ca6Zr3Fe2SiNb(Si3O9)2(Si9O27)2CO3(OH)3•H2O. The original formula was extended to show both the presence of cyclic silicate groups and silicon at the M4 site, according to the nomenclature of the eudialyte group. The characteristic feature of golyshevite is calcium-rich composition, with calcium at two main sites instead of one site. Together with feklichevite, fengchengite, ikranite and mogovidite it is a ferric-iron-dominant representative of the group. It is chemically similar to mogovidite. Golyshevite was named after Russian crystallographer Vladimir Mikhailovich Golyshev.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Golyshevite 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.
Golyshevite Localities Map
See where Golyshevite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Key Characteristics
Formation of Golyshevite
Golyshevite and mogovidite were found in calcium-bearing peralkaline pegmatites of the Kovdor massif, Kola Peninsula, Russia. Minerals associated with golyshevite are aegirine-augite, calcite, cancrinite, hedenbergite, orthoclase, pectolite, tacharanite, and thomsonite-Ca.
Quick Facts
Physical Properties
- Color
- Brown to red-brown
- Hardness (Mohs)
- 5.5
Chemical Properties
- Chemical Formula
- Na10Ca3Ca6Zr3Fe2SiNb(Si3O9)2(Si9O27)2CO3(OH)3 · H2O
- Elements
- C, Ca, Fe, H, Na, Nb, O, Si, Zr
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Golyshevite FAQs
How do I identify Golyshevite?
Golyshevite can be identified by its hardness of 5.5 on the Mohs scale, Brown to red-brown color. Look for these key characteristics when examining specimens.
What color is Golyshevite?
Golyshevite typically appears in Brown to red-brown. Color can vary depending on impurities and formation conditions.
How hard is Golyshevite?
Golyshevite has a hardness of 5.5 on the Mohs scale. This gives it moderate hardness.
What is the formation of golyshevite of Golyshevite?
Golyshevite and mogovidite were found in calcium-bearing peralkaline pegmatites of the Kovdor massif, Kola Peninsula, Russia. Minerals associated with golyshevite are aegirine-augite, calcite, cancrinite, hedenbergite, orthoclase, pectolite, tacharanite, and thomsonite-Ca.
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