collection of various samples of natural minerals

agate azurite background biotite bloodstone chessylite collage collection common cut cutout ferruginous garnet gem gemstone gneiss hantigyrite heliotrope isolated jade jaspilite jaspillite kyanite lot macro magnesium many mica mineral muscovite natural nunderite nundoorite obsidian out phlogopite polished quartzite raw rock rolled rough sample set specimen stone teisky tourmaline tumbled unpolished various white