calcite split piece from kobelwald crystal cave or calcit spaltstück aus kristallhöhle kobelwald minerals and crystals

agate ammonite aus azurit azurite background beautiful bliss bright closeup colorful crystals detail environment exhibition experiences explore extinct gem gemstone geological geology glossy greece griechenland grunge interior isolated laurion luxury macro marble matt mine minerals mollusc mount natural nature old onyx park pattern precious pyrit pyrite quartz quarz raw rhodochrosit rhodochrosite rock rough royal rustic santis schweiz shiny slab stone stones summit switzerland texture tiles translucent uncut wall wallpaper worlds