Courtesy: Harry Winston; Jamie McCarthy/WireImage
Diamonds are a girl's best friend. Just ask Jessica Chastain, who decorated her lovely décolleté with a jaw-dropping cascading diamond necklace by Harry Winston valued at $1.3 million!
That's right, million.
The stunning actress stole the spotlight at last night's New York screening of Mama wearing a number of pricey designer pieces including an elegant lace frock by Oscar de la Renta and peep-toe heels by Christian Louboutin, but we're in utter amazement at her brazen selection of such an elaborate accessory.