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Black gold
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Meaning
Noun
●
Raw
petroleum
;
crude
oil.
●
Black
pepper
, in the
context
of being a
historically
valuable
spice.
●
Black-coloured
gold
,
variously
produced
by
patination
,
deposition
,
oxidation
, etc. and used in
jewellery
or in
high-technology
applications.
●
Coal.
Sourced from
Wiktionary
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