Quartz var Smoky on Perthite

A columnar perthite ( Perthite is a combination of two different feldspars that form together, typically a sodium rich and a potassium rich member) with one complete termination hosts a large 6.5cm deeply saturated smoky. Contact on  the back of the smoky and the perthite is repaired (very nicely) at the first contact point with the smoky. A ding on the inside of the secondary quartz crystal. Ex Ken Roberts collection.

Locality: Dogtooth Peak, Fresno California