The High Chaparral (1967)

S3E4 A Piece of Land

When Buck Cannon stumbles upon a silver deposit, he eagerly convinces Manolito to team up with him for a big real estate venture. Lacking the funds for a down payment on Jeff Patterson's ranch, Buck proposes that Manolito invest as his partner for half the stake. Meanwhile, Victoria hands over a valuable necklace to her brother as collateral for a loan. However, the newly minted landowners soon discover that their silver find is actually worthless, leaving them in a precarious situation.