I don't actually save my icons as PSDs when I make them, but I tried my best to recreate this one :) This isn't my usual colouring, so it's basically just lots of minor adjustments to get to the desired colour (ie: I am sure there is an easier way to do this!)
Original:
x Duplicate base, set to screen
x Duplicate layer, set to soft light
x Curves Layer
x Colour Balance: Greens + 34
x Colour Fill #54543b Soft Light 100%
x Colour Fill #54543b Colour 60%
x Create Gradient Map #2c221f -> #f0eeee set to Soft Light 35%
x Create Vibrance Layer Vibrance +40
x Create Gradient Map #161d22 -> #f6fbfe set Soft Light 40%
x Vibrance +30
x Colour Fill #1d2d18 Lighter COlour 45%
x Colour Fill #222e33 Color 10%
x Colour Fill #222e33 Soft Light 25%
x Gradient Fill #000 (starting at the bottom of the image) Soft Light 50%
x Colour Fill #3b4b44 Screen #40
x Adjust Brightness/Contrast depending on your image
Final
x Add textures/text :)
* I don't give out PSDs.
* As always, this is meant to be a guide, please do not copy exactly! :)