Nicole Richie to design her own range of jewelry

Nicole Richie is set to launch her own range of jewelry.

The new mom, 26, said: "It’s all costume jewelry. I like to play with jewelry and mix and match."

Richie's new line is being produced with the company Mouawad -- the same people who do Heidi Klum’s fine jewelry collection. And Nicole is working with "this really talented woman named Shelley Gibbs. She’s an artist and she sketches everything," she explains.

But despite her latest venture and busy work schedule, new baby Harlow remains at the top of Nicole's priorities. "Everyone’s been really mellow and able to work around my schedule," she tells People magazine. "If I need to go feed the baby, I do it."

And Nicole isn't stopping at jewelry. She's also releasing her own range of infant and children’s wear lines, due out later this year -- and there's even rumors of a fragrance from the Simple Life star