scrap refining and taxes

[AL1]

Do you have to pay federal taxes on money received from scrap refining?
Some will give you cash others don't send 1099 and will send you a check.
I thought money for gold was not a taxable event, just like going to the coin shop
and buying gold or silver coins.

 

[AL1]

Gold er Tax Reporting Law
Gold dealers are not required to report an individual's sale of gold except in instances where more than 25 oz. of South African Krugerrands, Canadian Maple Leafs and Mexican Gold Onzas gold are sold. These types of gold are considered to be a regulated commodity, and the sale of such items must be reported by gold dealers to the IRS. The reporting of capital gain from the sale of all other forms of gold is otherwise left up to the individual seller to report.

Not sure how definitive this is?