Nenadkevichite
A variety of Minerals
What is Nenadkevichite?
Nenadkevichite is a rare silicate mineral containing niobium with formula: (Na,Ca)(Nb,Ti)Si2O7·2H2O. It forms brown to yellow to rose colored orthorhombic dipyramidal crystals with a dull to earthy luster. It has a Mohs hardness of 5 and a specific gravity of 2.86. It was first reported in 1955 from a nepheline syenite pegmatite in the Kola Peninsula. In addition it has been reported from Mont Saint-Hilaire, Canada; the Ilimaussaq complex, Greenland; Windhoek District, Namibia; and Zheltye Vody, Ukraine. It was named after Konstantin Avtonomovich Nenadkevich (1880–1963), Russian mineralogist and geochemist.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Nenadkevichite 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.
Nenadkevichite Localities Map
See where Nenadkevichite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Rose-pink, very light pink, light yellow, brown; dark brown due to inclusions
- Hardness (Mohs)
- 5
- Density
- 2.7 g/cm³
- Streak
- White, very light rose-pink
Chemical Properties
- Chemical Formula
- (Na,◻)8Nb4(Si4O12)2(O,OH)4 · 8H2O
- Elements
- H, Na, Nb, O, Si
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Nenadkevichite FAQs
How do I identify Nenadkevichite?
Nenadkevichite can be identified by its hardness of 5 on the Mohs scale, Rose-pink color. Look for these key characteristics when examining specimens.
What color is Nenadkevichite?
Nenadkevichite typically appears in Rose-pink, very light pink, light yellow, brown; dark brown due to inclusions. Color can vary depending on impurities and formation conditions.
How hard is Nenadkevichite?
Nenadkevichite has a hardness of 5 on the Mohs scale. This gives it moderate hardness.
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