# black gold

> English word · Noun

## Definitions
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.

## Etymology
(crude oil; coal; black pepper): From its black colour and high value.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/black-gold