A quartz-filled geode from Mont Lyall, Gaspe Peninsula, Quebec. These form in Devonian volcanics of the Chic-Choc mountains, when hot water percolates through cavities. The quarry is a pick-your-own-nodules, with a service to saw them open -no guarantees!
#Quartz #MinCup24 #MineralCup #Quebec #Geode #Geology