Stone Letters

Start with a new image in RGB mode and write the text with black foregroundcolor.
	Open a pattern that looks like marble. copy and paste it into your Stone image (this image can be found on my website) Mark the content in your textlayer and select inverse. Press delet while standing on the pattern layer.
Go to Layer/layer styles and use the settings in Bevel/emboss as you can see here below.
Use the texture nebula in the Bevel/emboss layerstyle.
And this is the final result