Perthite
$250.00
Out of stock
Perthite is a combination of two different feldspars that form together, typically a sodium rich and a potassium rich member. This choice specimen has a main crystal that is 3.5cm and doubly terminated. Many smaller sister crystals make up a highly aesthetic hand sized specimen. Ex Ken Roberts collection
Locality: Dogtooth Peak, Fresno County California
Composition: potassium-rich alkali feldspar and sodic alkali feldspar
Dimensions:
7 × 5.5 × 3.5 cm