retinite

Same as retinellite.

Highgate resin.

One of the French names for pitchstone or obsidian, occasionally used in this sense by writers in English, especially in translating from the French. See cut under fluidal.

An inflammable mineral resin, usually of a yellowish brown color, found in roundish masses, sometimes with coal.

Any of various resins, similar in appearance to amber, associated with brown coal.