I think I may have found the smallest tube of $525 dollars. This La Prairie Cellular Radiance Concentrate Pure Gold Face Serum is flecked with 24 karat gold pieces. And you know the price of gold is up right? Regardless, this gold saturated serum illuminates and brightens skin immediately while reducing age spots, rapidly plumps lines and wrinkles within one hour and enhances natural collagen and elastin production. I'd like to know if it comes with a solid gold beauty guarantee!