set of various brown rough stones with names

andradite axinite background brown collage collection cut cutout description dravite flint garnet goethite halite impactite isolated magnetic mineral name natural out peat pyrite pyrrhotite quartz quartzite rauchtopaz raw rhyolite rock rough salt sample set smoky specimen stone suevite tagamite thomsonite tourmaline turf unpolished various white wolframite zircon zirkon