round blue agate lying on a black plate

039 abstract agate almond backlight banded beauty black blue bowl circular closeup colour coloured copy crosssection crust crystal crystalline crystallization detail disc druse earth edelstein flat geologically geology grain history hole light lying macro middle mineral multicolored naturally nature object patterned plate polished quartz reclining rock round semiprecious shot slate space stone strip striped structures studio surface surrounded template thin variety volcanic