Representative samples of fossil resins from Congo (A–C) and Ethiopia (D–F). A. Polished piece of orange-yellowish Congolese copal. B. Raw piece of Congolese Cretaceous amber. C. Polished piece of orange-reddish Cretaceous Congolese amber. D. Raw piece of orange-yellowish Ethiopian Miocene amber. E. Raw piece of yellow Ethiopian Miocene amber. F. Polished piece of light green Ethiopian Miocene amber.