When you are done and your texture now has a lot more contrast, like the real granite stone has, press Ctrl + U, to go to Hue / Saturation window. Reduce the Saturation and move the “Hue” arrow to 94 (green hues). This is very much optional, you may as well choose a different hue, such as blue or reddish, but bare in mind that it has to be a “natural” stone colour. Moreover, if you will not reduce the saturation, your image will be too bright and will not look natural, let alone will hurt the eyes.

Design a Granite Texture Interface - PS Tutorials Lorelei Web Design

So far your result will look like this:

Design a Granite Texture Interface - PS Tutorials Lorelei Web Design

Still not 100% natural stone look, so It’s duplicate the layer (Layer >> Duplicate Layer…) and go to Filter >> Blur >> Gaussian Blur, with radius of 2 pixels.

Design a Granite Texture Interface - PS Tutorials Lorelei Web Design

Remember that the blur was applied to the upper layer. Click the Layers tab in your small Layers / Channels / Paths window, and set the blurred layer opacity to 45%.

Design a Granite Texture Interface - PS Tutorials Lorelei Web Design

That is it. Now your texture has a very gently blurred yet strong effect. Enjoy!

Design a Granite Texture Interface - PS Tutorials Lorelei Web Design