Peretaite
A variety of Minerals
What is Peretaite?
Peretaite is a sulfate of antimony and calcium. The mineral, Ca(SbO)4(SO4)2(OH)2 (2(H2O)), was named Peretaite for its locality. It was first discovered in an antimony-bearing vein at Pereta, Tuscany, Italy.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Peretaite 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.
Peretaite Localities Map
See where Peretaite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Key Characteristics
Characteristics of Peretaite
The mineral peretaite has transparent crystals that are colorless. It has a vitreous luster and perfect {100} cleavage. The density of peretaite was determined by a heavy-liquid method, crystals tend to float in a Clerici solution, which has a density of 4.0 g/cm, therefore the density is 3.8 g/cm.
Formation of Peretaite
Peretaite occurs in only small quantities, as aggregates of tabular crystals. The crystals are found in the geodes of a deeply silicified limestone. It also occurs in the cavities of columnar stibnite. Other associated minerals are stibnite, quartz, calcite, pyrite, valentinite, kermesite, sulfur, and gypsum. Peretaite can often be red from the inclusion of valentinite. The mineral was formed by the action of sulfuric acid on the stibnite; peretaite is closer to the boundary of the country rock limestone, which is the source of the calcium in peretaite.
Quick Facts
Physical Properties
- Color
- Colourless
- Hardness (Mohs)
- 3.5 - 4
- Density
- 4.06 g/cm³
Chemical Properties
- Chemical Formula
- Ca(SbO)4(SO4)2(OH)2 · 2H2O
- Elements
- Ca, H, O, S, Sb
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Peretaite FAQs
How do I identify Peretaite?
Peretaite can be identified by its hardness of 3.5 - 4 on the Mohs scale, Colourless color. Look for these key characteristics when examining specimens.
What color is Peretaite?
Peretaite typically appears in Colourless. Color can vary depending on impurities and formation conditions.
How hard is Peretaite?
Peretaite has a hardness of 3.5 - 4 on the Mohs scale. This gives it moderate hardness.
What is the characteristics of peretaite of Peretaite?
The mineral peretaite has transparent crystals that are colorless. It has a vitreous luster and perfect {100} cleavage. The density of peretaite was determined by a heavy-liquid method, crystals tend to float in a Clerici solution, which has a density of 4.0 g/cm, therefore the density is 3.8 g/cm.
What is the formation of peretaite of Peretaite?
Peretaite occurs in only small quantities, as aggregates of tabular crystals. The crystals are found in the geodes of a deeply silicified limestone. It also occurs in the cavities of columnar stibnite. Other associated minerals are stibnite, quartz, calcite, pyrite, valentinite, kermesite, sulfur, and gypsum. Peretaite can often be red from the inclusion of valentinite. The mineral was formed by the action of sulfuric acid on the stibnite; peretaite is closer to the boundary of the country rock limestone, which is the source of the calcium in peretaite.
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