Stone - Font  
1. Start by creating clouds with a foreground color of black and a Background color of white. Filter- Render- Clouds. The size and resolution of your document depend on how big you want the final document to be. Work in RGB mode.

2. Next create a new channel in the Channels Palette. In that channel, add Difference Clouds. Then go back to your original RGB clouds

3. To give your clouds depth, add Effects. Try making the Light Type Directional with the Texture Channel Alpha 1 (the Difference Clouds) and Height Mountainous.

4. Use the horizontal Mask Type Tool to create your type. When done editing the type, press Enter. Then select Inverse and delete the background.

5. To add depth to the type, add a Bevel effects from the Layer Style dialog box. Experiment with various textures. Make sure the Technique is set to Chisel Hand.

6. To add color, experiment with the Image Adjustments Hue/Saturation dialog box. Try checking Colorize with a hue of a round 35.