Mineralpedia Details for Peretaite

Named for the type locality in the Pereta mine in Tuscany, Italy. Peretaite is a rare mineral found only at its type locality and a couple other mines in Italy, as well as possibly one purported mine in Luxembourg. At the type locality, it forms as a result of sulfuric acid acting on stibnite in oxidized, limestone-hosted, hydrothermal, antimony-rich deposits.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/peretaite.pdf

Formula

CaSb³⁺₄O₄(SO₄)₂(OH)₂·2H₂O 

Crystal System

Monoclinic 

Crystal Habit

Tabular 

Cleavage

Perfect, None, None 

Luster

Vitreous (Glassy) 

Color

colorless, white 

Streak

white 

Class

Monoclinic - Prismatic 

Hardness

3.5-4 

WebMineral

View Peretaite 

Mindat

View Peretaite 

Colorless micro, very thin bladed Peretaite crystals in sprays tucked in the tiny open vugs (<1mm wide) in Stibnite matrix.