Marrite
A variety of Minerals
What is Marrite?
Marrite (mar'-ite) is depicted by the chemical formula PbAgAsS3. It is the arsenic equivalent of mineral freieslebenite (PbAgSbS3), but also displays close polyhedral characteristics with sicherite and diaphorite. Marrite was named in honor of geologist John Edward Marr (1857–1933) of Cambridge, England.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Marrite 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.
Marrite Localities Map
See where Marrite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Key Characteristics
Formation of Marrite
The only known occurrence of Marrite is the type locality of the Lengenbach quarry in Binntal, Valais, Switzerland. It is primarily formed because of hydrothermal activity, which involves water and high temperatures. Marrite is predominately found in dolomite along with a variety of other sulfosalts.
Quick Facts
Physical Properties
- Color
- Lead-gray, steel-gray; often iridescent due to tarnish
- Hardness (Mohs)
- 3
- Streak
- Black with a chocolate-brown tint.
Chemical Properties
- Chemical Formula
- AgPbAsS3
- Elements
- Ag, As, Pb, S
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Marrite FAQs
How do I identify Marrite?
Marrite can be identified by its hardness of 3 on the Mohs scale, Lead-gray color. Look for these key characteristics when examining specimens.
What color is Marrite?
Marrite typically appears in Lead-gray, steel-gray; often iridescent due to tarnish. Color can vary depending on impurities and formation conditions.
How hard is Marrite?
Marrite has a hardness of 3 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
What is the formation of marrite of Marrite?
The only known occurrence of Marrite is the type locality of the Lengenbach quarry in Binntal, Valais, Switzerland. It is primarily formed because of hydrothermal activity, which involves water and high temperatures. Marrite is predominately found in dolomite along with a variety of other sulfosalts.
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