black gold

Etymology
From its black colour and high value.

Noun

 * 1)  Raw petroleum; crude oil.
 * 2) Black pepper, in the context of being a historically valuable spice.
 * 3) Black-coloured gold, variously produced by patination, deposition, oxidation, etc. and used in jewellery or in high-technology applications.
 * 4) Coal.
 * 1) Coal.

Synonyms

 * See also Thesaurus:petroleum.

Translations

 * Azerbaijani: qara qızıl
 * Dutch: zwart goud
 * Finnish: musta kulta
 * French:
 * German: schwarzes Gold
 * Greek:
 * Italian: oro nero
 * Polish:
 * Portuguese: ouro negro
 * Romanian:
 * Russian: чёрное зо́лото
 * Spanish: oro negro
 * Turkmen: