[random314]

Isn't the phrase gold mine?

[Integrape]

You build the mine after finding the vein.

[sp332]

A vein of gold is an incredibly pure area of ore. Sometimes you can basically pick chucks of gold up off the ground. https://www.livescience.com/bonanza-gold-vein-nanoparticles....

[amelius]

You can't accidentally hit a gold mine like you can a gold vein.