Large Needle Quartz Group from Val Bedretto - Mineralia.ch
Smoky quartz from mount galenstock, uri, switzerland leinwandbilder • bilder Schweiz, uri, alpine | myloview.de
Quartz with Chlorite - Switzerland - Etzli Valley - Madernertal - Uri - Quartz SiO2 - silicon dioxide - The most common mineral on earth - Many industrial uses including glass