pure
real
solid
fool's
9-carat, 18-carat, etc.
molten
beaten, rolled
burnished
tarnished
white

extract, mine, produce
look for, pan for, prospect for
He spent weeks panning for gold in the river.

discover, find, strike
be set in
The rubies were set in 18-carat gold.

mine, miner, mining, prospecting, prospector
rush
a gold-rush town

deposit, dust, nugget
bar, bullion, ingot
bracelet, chain, coin, earring, jewellery/jewelry, necklace, ring, etc.
leaf, plate
market, reserves, stocks
falling government gold stocks

standard
The currency was tied to the gold standard.
Disney remains the gold standard of family entertainment. (figurative)

a vein of gold
The next day he struck a rich vein of gold.

Olympic

get, take, win
She got a gold in the long jump.

go for
She's going for gold this time.