Things You'll Need
Instructions
Download the Minecraft Cartographer software, and install the program. Click on the application button to open the software.
Select the world where you want to search for diamonds in the program. This is done by entering the server number into the program, or selecting the name of the world from a list of available ones on your copy of "Minecraft." Click the "Render" button.
Change the second 0 to 56 in the text box. Save this info with another file name, such as "diamond."
Open your "Minecraft" world file in paint. Open the "diamond" file in paint as well. Copy the diamond file by pressing "CTRL and A" then "CTRL and C."
Go to the original "Minecraft" world file. Click on the "Image" tab. Then click on the "Transparent select" option. Paste the information you copied from the diamond file.
Open the "Minecraft" world. The screen should now show many small dots inside the game. These are the locations of the diamonds. When you stand over a dot, mine straight down to reach the diamonds and mine them for future use. You must have an iron pick to mine diamonds.