different stones, precious and rocks on a beige background. gemological concept. study of minerals and bowels of the earth.

alexandrite assorted background beige black bowels brown concept crystal crystals different earth earthn gem gemmology gemological gemology gemstone geodes geological geology glass gray grey healthy jeweler jewelry kunzite magnifying material mine mineral mineralogy minerals natural ncopyspace precious quartz raw resources rock rocks rough sapphire science set shiny soil spiritual stone stones structure study tanzanite texture the topaz uncut useful