With pieces of bright and luxurious jewelry that easily push the $1 million mark, red carpet celebrities get to wear some of the most amazing designs and cuts available, even if it's only for one night in a lot of cases.

When it comes to diamonds, one name in Hollywood shines brightest: Harry Winston. Known as the "jeweler to the stars," the 81-year-old diamond company has outfitted celebrities off and on screen for decades.

Left: Actress Jessica Chastain wearing the Water by Harry Winston "Splash" Diamond Necklace, valued at $1.25 million, at the 19th Annual Screen Actors Guild Awards held at The Shrine Auditorium on January 27, 2013 in Los Angeles, California. See the Full Gallery