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Quote from Omega74th You place iron, diamond, emerald, or gold blocks in a square and then u put the beacon in the middle on top http://www.minecraft...ents_12w32a.png
http://www.minecraftwiki.net/wiki/File:Beacon_Pyramid_Arangements_12w32a.png
As this user said, iron, diamond, emerald, or gold in a pyramid shape. put the beacon on top and test to see if it emits light