silverwitch:- Quartz is the most common mineral found on the face of the earth and occurs in all environments and all rock types - sedimentary, metamorphic or igneous. Its name derives from the German.
crystals of Linarite. The close-up clearly displays the intense color of these thin Linarite crystals! All the crystals are nestled snug in a vug of Quartz crystals and breccia matrix. From the Grand Reef Mine in Graham County, Arizona.