Installation: Just replace the original terrain file with this one in the Minecraft Jar
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I reskinned all of the gems except redstone and coal to make them look like the cores from Portal 1 or 2
Lapis Lazuli to Sugilite
Gold to Fluorite
Iron to Citrine
Link: http://www.mediafire.com/?1xqr9mz2ilon22y
Installation: Just replace the original terrain file with this one in the Minecraft Jar
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I reskinned all of the gems except redstone and coal to make them look like the cores from Portal 1 or 2
Preview:
Portal 2 Cores Download: http://www.mediafire.com/?3vvicmfqf2528jv
Portal 1 Cores Download: http://www.mediafire.com/?i1o1m8txv3o1rit
Installation: Put the zip file into the Texture Pack folder in the Minecraft folder
Also I give credit to carlotta4th credit for the core textures.