Calderite
A variety of Minerals
What is Calderite?
Calderite is a mineral in the garnet group with the chemical formula (Mn, Ca)3(Fe, Al)2(SiO4)3. It is dark reddish brown to dark yellowish in color and generally granular massive in form. It was named for geologist James Calder who worked on the geology of India. The name was first applied to a rock in manganese deposits in Katkamsandi, Hazaribagh district, Bihar and at Netra, Balaghat district, Madhya Pradesh, India. later transferred to its predominant mineral. In 1909 it was described as a mineral from Otjosondu, Otjozondjupa Region, Namibia.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Calderite 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.
Calderite Localities Map
See where Calderite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Dark reddish brown to dark yellowish, brown-yellow
Chemical Properties
- Chemical Formula
- Mn2+3Fe3+2(SiO4)3
- Elements
- Fe, Mn, O, Si
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Calderite FAQs
How do I identify Calderite?
Calderite can be identified by its Dark reddish brown to dark yellowish color. Look for these key characteristics when examining specimens.
What color is Calderite?
Calderite typically appears in Dark reddish brown to dark yellowish, brown-yellow. Color can vary depending on impurities and formation conditions.
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