How should I update my Coral Rock Fireplace?

Marvelous pictures. On the show Color Splash, Danielle does alot of renovating fireplaces. I'd get 2 or 3 colors of natural stone colors and dab each on on to make it look like real stone. To get more information, go to hgtv.com/colorsplash. Hope this helps and keep up the great work! Roxanne