All that glimmers is surely gold . . . or platinum, or diamond-encrusted. That's what the Oscars red carpet had us realizing. From archival jewels dating back to the beginning of the 20th century to brand-new debuts from trademark jewelers, the stars didn't leave a single gemstone unturned. Ahead, we've collected the most lust-worthy accessory moments that deserve a second - or third, or fifteenth - look. Just try not to reach through your computer screen to swipe it. They're on loan.