Quartz Jacinto de Compostela
Image: <a href="//commons.wikimedia.org/wiki/User:Archaeodontosaurus" title="User:Archaeodontosaurus">Didier Descouens</a> (CC BY-SA 4.0)
Mineral NameQuartz Jacinto de Compostela
Chemical FormulaSiO2
Mohs Hardness7
Crystal Systemtrigonal
Lustervitreous
Streak Colorwhite
Cleavagenone
Fractureconchoidal
Specific Gravity2.65
Colorsreddish-orange, white, light brown
Transparencytransparent
Type LocalityProvincia de Guadalajara - Spain
Mineral GroupSilicates
Usescollector, jewelry
Associated Mineralsfeldspar, calcite, hematite
Rarityuncommon
Description
A vibrant reddish-orange, well-formed quartz crystal, known as Jacinto de Compostela, is prominently displayed on a lighter-colored, granular matrix, with smaller crystals also visible.
Geological Context
Jacinto de Compostela quartz typically forms in hydrothermal veins or vugs within sedimentary rocks, often deriving its distinctive hyacinth-red color from inclusions of iron oxides like hematite.
