Quartz (Dauphine twins) (ex Harold Urish Collection)

Item Description

An attractive group of Dauphine habit twinned Quartz from an unknown locality in Mexico. From quartzpage.de: "In a Dauphine Law twin either only right or only left handed quartz structures are combined in a crystal. The subindividuals are rotated around the c-axis by 60 degrees relative to each other. In a Dauphine Law twin the r and z rhombohedra cannot be distinguished, and accordingly Dauphine Law twins often display a pseudohexagonal habit". From the collection of Harold Urish. Enjoy!