Thomsenolite

A variety of Minerals

What is Thomsenolite?

Thomsenolite is a mineral with formula: NaCaAlF6·H2O. It is an alteration product of cryolite. It was discovered in 1868 in Ivigtut, Greenland and named for Hans Peter Jorgen Julius Thomsen (1826–1909).

Market Value Factors

Pricing varies for every rock and mineral, so use these universal factors to gauge Thomsenolite 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.

Applies to all rocks & minerals.

Quick Facts

Physical Properties

Color: Colourless, white, pale lilac; brownish or reddish tinted due to staining; colourless in transmitted light.
Hardness (Mohs): 2
Rock tumbling: Not recommended
Density: 2.986 g/cm³
Streak: White

Chemical Properties

Chemical Formula: NaCa[AlF₆] · H₂O
Elements: Al, Ca, F, H, Na, O

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Thomsenolite FAQs

How do I identify Thomsenolite?

Thomsenolite can be identified by its hardness of 2 on the Mohs scale, Colourless color. Look for these key characteristics when examining specimens.

What color is Thomsenolite?

Thomsenolite typically appears in Colourless, white, pale lilac; brownish or reddish tinted due to staining; colourless in transmitted light.. Color can vary depending on impurities and formation conditions.

How hard is Thomsenolite?

Thomsenolite has a hardness of 2 on the Mohs scale. This makes it a soft mineral that can be scratched easily.