collection of colorful gemstones and crystals are laid out on a white surface.

mineral collection stone isolated rock nature crystal white gem set gemstone various quartz specimen brown geology pyrite pebble collage tourmaline calcite sample raw corundum prehnite turquoise epidote green object background chalcedony lamprophyllite jasper jaspilite hematite diopside ore mica opal rough name piece dioptase malachite aragonite almandine description andradite ai generated