Follow the Steps:
1. Create a new file - File >> New
Keyboard shortcut - Ctrl+N
(Width: 300px, height: 300px, Resolution: 100)
2. Create a New Layer – Layer >>New>>Layer
Keyboard shortcut – Shift+Ctrl+N
3. Set the foreground color to # 999999
4. Select Ellipse Tool from the Tool Bar
Keyboard shortcut – U
5. Now draw a circle shape on the canvas.
6. Select the Direct Selection Tool from the Tool Bar
Keyboard Shortcut – A
7. Now change the shape of the circle to a pebble shape
8. Right click on the layer and select ‘Rasterize Layer’
9. Apply Noise filter – Filter>>Noise>>Add Noise
Change the Amount to 14.58% (You can change it according to your needs)
10. Now apply Bevel and Emboss – Layer>>Layer Style>>Bevel and Emboss
(I applied the following properties you can change them as per your requirement)
Style: Inner Bevel
Technique: Smooth
Depth: 101%
Direction:Up
Size:27px
Soften:16px
Rest option: keep default
11. Now apply Drop Shadow – Layer>>Layer Style>>Drop Shadow
12. Now your pebble is Ready..
Credits : Raj Kumar Ramoju
Contact me : ramojuraju@gmail.com