ozocerite

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A yellow-brown to black or green hydrocarbon wax, found in irregular veins in sandstones and used in making electrical insulation and polishes.

Century Dictionary and Cyclopedia

1. n. A mixture of natural paraffins existing in the bituminous sandstones of coal-measures. It is like resinous wax in consistence and translucency, of a brown or brownish-yellow color, and of a pleasantly aromatic odor. In Moldavia it occnrs in sufficient quantities to be used for economic purposes, and it is made into candles. A related resin is found in considerable quantities in southern Utah. Also called mineral tallow and mineral wax.
2. To treat with ozocerite or native paraffin.

Wiktionary

1. n. mineralogy A dark waxy mineral, found associated with petroleum in some sandstones, used to make polishes.

GNU Webster's 1913

1. n. (Min.) A waxlike mineral resin; -- sometimes called native paraffin, and mineral wax.

WordNet 3.0

1. n. a waxy mineral that is a mixture of hydrocarbons and occurs in association with petroleum; some varieties are used in making ceresin and candles