Cornered

"Illustration" courtesy of:  https://www.craiyon.com "gold or silver"

Let's consider a "mythical" or unlikely scenario.  A "vein" of gold or silver is "discovered" which is:

• A "mile" long or a "foot" wide.
• A "foot" long or a "mile" wide.

Does it matter where it's found?  No.  What matters is whether it's "recoverable".

Could a "market" then be "cornered" or "crashed"?  Maybe.  What matters is the existing "wealth" which would vanish when supply exceeds demand.

Does a more "precious metal" then "become gold" and "gold become the new silver"?

That's backward or the right question to ask.