Next, I headed to Harry Winston, where I was brought to a side room. A salesperson laid out a black velvet tray of massive stones for me to try on. I slipped on the biggest one which looked like a headlight! The 7.76-carat ring with tapered diamond baguettes on either side looked outlandish on my unmanicured hands. How would I type with this thing on? Brush my teeth? Look my friends in the face? The stone itself was incredibly clear and sparkly; all of Winston's diamonds are D, E, or F, and it shows. 718 Fifth Ave., at 56th St.; 212-245-2000