Last night at ABC Kitchen,Tiffany threw a dinner in honor of its Blue Book Collection — a line consisting of the fanciest of the fancy gems found in the world — the work of its relatively new design director, Francesca Amfitheatrof. So, naturally, the crowd that showed up came decked in diamonds, pearls, and other gigantic jewels that would normally require a cadre of armed bodyguards. Reese Witherspoon arrived in a sleek navy dress paired with a fantastic green-tourmaline-and-diamond pendant, green-tourmaline-and-diamond bracelet (as well as a diamond ring and diamond earrings), and Olivia Wilde made an appearance in Marchesa and dangly emerald-cut pink-spinel-and-diamond earrings. Rounding out the pretty-actress triumvirate was Amber Heard, in a pumpkin slip dress accented with gobs of diamonds around her neck, wrist, and ears.
Click ahead to see some of the spectacular jewels (along with the pretty people who wore them) — plus, Misty Copeland, Leigh Lezak, Constance Jablonski, and more.