set of various brown rough rocks with names cutout

andradite astrophyllite background brown collage collection crystal cut cutout description dolomite dolostone dravite flint garnet gneiss halite impactite isolated magnetic mahogany mineral name natrolite natural obsidian out peat pyrite pyrrhotite quartz rauchtopaz raw rock rough salt sample set smoky specimen stone suevite tagamite tourmaline turf unpolished various white wolframite zircon zirkon