Kogarkoite
A variety of Minerals
What is Kogarkoite?
Kogarkoite is a sodium sulfate fluoride mineral with formula Na3(SO4)F. It has a pale blue color, a specific gravity of about 2.67 and a hardness of 3.5. The crystal is monoclinic and is a type of naturally occurring antiperovskite. Kogarkoite is named after the Russian petrologist Lia Nikolaevna Kogarko (born 1936) who discovered the mineral.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Kogarkoite 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.
Key Characteristics
Formation of Kogarkoite
Kogarkoite was first described in 1973 for an occurrence on Alluaiv Mountain, Lovozero Massif, Kola Peninsula, Russia. On Alluaiv it occurs in pegmatitic veins in nepheline syenite. It occurs with sodalite in syenite xenoliths in an alkali intrusive complex at Mont Saint-Hilaire, Canada. In Hortense Hot Spring, Chaffee County, Colorado, it occurs as a sublimate. It occurs at Lake Natron near Ol Doinyo Lengai, Tanzania and Suswa Volcano, Lake Magadi, Kenya.
Quick Facts
Physical Properties
- Hardness (Mohs)
- 3.5
- Rock tumbling
- Not recommended
Chemical Properties
- Chemical Formula
- Na3(SO4)F
- Elements
- F, Na, O, S
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Kogarkoite FAQs
How do I identify Kogarkoite?
Kogarkoite can be identified by its hardness of 3.5 on the Mohs scale. Look for these key characteristics when examining specimens.
How hard is Kogarkoite?
Kogarkoite has a hardness of 3.5 on the Mohs scale. This gives it moderate hardness.
What is the formation of kogarkoite of Kogarkoite?
Kogarkoite was first described in 1973 for an occurrence on Alluaiv Mountain, Lovozero Massif, Kola Peninsula, Russia. On Alluaiv it occurs in pegmatitic veins in nepheline syenite. It occurs with sodalite in syenite xenoliths in an alkali intrusive complex at Mont Saint-Hilaire, Canada. In Hortense Hot Spring, Chaffee County, Colorado, it occurs as a sublimate. It occurs at Lake Natron near Ol Doinyo Lengai, Tanzania and Suswa Volcano, Lake Magadi, Kenya.
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