Copaline

Copalite (or copaline), also termed fossil resin and Lowgate resin, is a naturally occurring organic substance found as irregular pieces of pale-yellow colour in the London Clay at Highgate Hill. It has a resinous aromatic odour when freshly broken, volatilizes at a moderate temperature, and burns readily with a yellow, smoky flame, leaving scarcely any ash.

References

•  This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed (1911). Encyclopædia Britannica (11th ed.). Cambridge University Press.