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Royalty-Free Chemical Photos, dominant color: black
1920x1271
man wearing laboratory gown and eyeglsses
Public Domain
2500x1667
person wearing gray gas mask
Public Domain
5184x3456
mortar and pistle on wooden surface
Public Domain
3456x5184
mortar and pestle with green leaves beside books
Public Domain
5184x3456
white and brown mortar and pestle beside two brown hardbound books
Public Domain
5414x3626
photography of black high-rise building at night time
Public Domain