Hey guys I've come across some people that use the following verse to prove the KJV has errors in it:

Deu 8:9 A land wherein thou shalt eat bread without scarceness, thou shalt not lack any thing in it; a land whose stones are iron, and out of whose hills thou mayest dig brass.


They have told me that there is no way to dig brass out of a mountain. Brass is a mixture of two minerals, copper and zinc. They use this to say that the translators made an error here. I don't necessarily know what the verse is "supposed to say" according to them.

I would appreciate your thoughts on the issue! Thanks guys.