Alumohydrocalcite

A variety of Minerals

Alumohydrocalcite specimen

What is Alumohydrocalcite?

Alumohydrocalcite is a calcium aluminum carbonate mineral with the chemical formula CaAl2(CO3)2(OH)4·4H2O). Its type locality is Khakassia, Russia.

Market Value Factors

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

Alumohydrocalcite Localities Map

See where Alumohydrocalcite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.

Map preview
North ZoneCentral RidgeSouth Basin

Interactive map layers and collecting notes are available in the app.

Quick Facts

Physical Properties

Color
Chalky white to pale blue, pale yellow, cream, gray; pale rose or brownish pink to dark violet in Cr-bearing varieties
Hardness (Mohs)
2.5

Chemical Properties

Chemical Formula
CaAl2(CO3)2(OH)4 · 4H2O Previously assumed to have only three water molecules per formula unit.
Elements
Al, C, Ca, H, O

Also Known As

AlumohydrocalciteKhakassite
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Alumohydrocalcite FAQs

How do I identify Alumohydrocalcite?

Alumohydrocalcite can be identified by its hardness of 2.5 on the Mohs scale, Chalky white to pale blue color. Look for these key characteristics when examining specimens.

What color is Alumohydrocalcite?

Alumohydrocalcite typically appears in Chalky white to pale blue, pale yellow, cream, gray; pale rose or brownish pink to dark violet in Cr-bearing varieties. Color can vary depending on impurities and formation conditions.

How hard is Alumohydrocalcite?

Alumohydrocalcite has a hardness of 2.5 on the Mohs scale. This makes it a soft mineral that can be scratched easily.

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