Smoky Quartz, Mt Bischoff, Tasmania at crocoite.com

SiO2 (trigonal)

Photo by Steve Sorrell
Steve Sorrell Collection (self collected)

Smoky Quartz with fluorite and siderite, Mount Bischoff Tin Mine, Waratah, Tasmania.
The specimen is about 60mm.

Smoky Quartz, Mt Bischoff