Margarite
A variety of Minerals
What is Margarite?
This article refers about a member of the mica group, and should not be confused with "margarita". Margarite is a calcium rich member of the mica group of the phyllosilicates with formula: CaAl2(Al2Si2)O10(OH)2. It forms white to pinkish or yellowish gray masses or thin laminae. It crystallizes in the monoclinic crystal system. It typically has a specific gravity of around 3 and a Mohs hardness of 4. It is translucent with perfect 010 cleavage and exhibits crystal twinning. It occurs commonly as an alteration product of corundum, andalusite and other aluminous minerals. It has been reported as forming alteration pseudomorphs of chiastolite along with muscovite and paragonite. The margarite in this occurrence forms preferentially along the dark graphite rich inclusions with the chiastolite crystals.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Margarite 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.
Margarite Localities Map
See where Margarite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Grayish, pale pink, yellow, green. Colorless in thin section.
- Hardness (Mohs)
- 4
- Density
- 3.077 g/cm³
- Streak
- White
Chemical Properties
- Chemical Formula
- CaAl2(Al2Si2O10)(OH)2
- Elements
- Al, Ca, H, O, Si
Also Known As
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Margarite FAQs
How do I identify Margarite?
Margarite can be identified by its hardness of 4 on the Mohs scale, Grayish color. Look for these key characteristics when examining specimens.
What color is Margarite?
Margarite typically appears in Grayish, pale pink, yellow, green. Colorless in thin section.. Color can vary depending on impurities and formation conditions.
How hard is Margarite?
Margarite has a hardness of 4 on the Mohs scale. This gives it moderate hardness.
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