How about some new Matter types? Much love to @BigBadChris! (Support him at http://www.patreon.com/bigbadchris)

src/main/java/com/pahimar/ee3/init/ModItems.java

@@ -20,6 +20,7 @@ public class ModItems
     public static final ItemEE diviningRod = new ItemDiviningRod();
     public static final ItemEE alchemicalTome = new ItemAlchemicalTome();
     public static final ItemEE guide = new ItemGuide();
+    public static final ItemEE matter = new ItemMatter();
 
     public static void init()
     {
@@ -35,5 +36,6 @@ public class ModItems
         GameRegistry.registerItem(diviningRod, Names.Items.DIVINING_ROD);
         GameRegistry.registerItem(alchemicalTome, Names.Items.ALCHEMICAL_TOME);
         GameRegistry.registerItem(guide, Names.Items.GUIDE);
+        GameRegistry.registerItem(matter, Names.Items.MATTER);
     }
 }

src/main/java/com/pahimar/ee3/item/ItemMatter.java

@@ -0,0 +1,69 @@
+package com.pahimar.ee3.item;
+
+import com.pahimar.ee3.reference.Names;
+import com.pahimar.ee3.reference.Textures;
+import cpw.mods.fml.relauncher.Side;
+import cpw.mods.fml.relauncher.SideOnly;
+import net.minecraft.client.renderer.texture.IIconRegister;
+import net.minecraft.creativetab.CreativeTabs;
+import net.minecraft.item.Item;
+import net.minecraft.item.ItemStack;
+import net.minecraft.util.IIcon;
+import net.minecraft.util.MathHelper;
+
+import java.util.List;
+
+public class ItemMatter extends ItemEE
+{
+    @SideOnly(Side.CLIENT)
+    private IIcon[] icons;
+
+    public ItemMatter()
+    {
+        super();
+        this.setMaxStackSize(64);
+        this.setHasSubtypes(true);
+        this.setUnlocalizedName(Names.Items.MATTER);
+    }
+
+    @Override
+    public String getUnlocalizedName()
+    {
+        return String.format("item.%s%s", Textures.RESOURCE_PREFIX, Names.Items.MATTER);
+    }
+
+    @Override
+    public String getUnlocalizedName(ItemStack itemStack)
+    {
+        return String.format("item.%s%s%s", Textures.RESOURCE_PREFIX, Names.Items.MATTER, Names.Items.MATTER_SUBTYPES[MathHelper.clamp_int(itemStack.getItemDamage(), 0, Names.Items.MATTER_SUBTYPES.length - 1)]);
+    }
+
+    @Override
+    @SideOnly(Side.CLIENT)
+    public void getSubItems(Item item, CreativeTabs creativeTab, List list)
+    {
+        for (int meta = 0; meta < Names.Items.MATTER_SUBTYPES.length; ++meta)
+        {
+            list.add(new ItemStack(this, 1, meta));
+        }
+    }
+
+    @Override
+    @SideOnly(Side.CLIENT)
+    public IIcon getIconFromDamage(int meta)
+    {
+        return icons[MathHelper.clamp_int(meta, 0, Names.Items.MATTER_SUBTYPES.length - 1)];
+    }
+
+    @Override
+    @SideOnly(Side.CLIENT)
+    public void registerIcons(IIconRegister iconRegister)
+    {
+        icons = new IIcon[Names.Items.MATTER_SUBTYPES.length];
+
+        for (int i = 0; i < Names.Items.MATTER_SUBTYPES.length; i++)
+        {
+            icons[i] = iconRegister.registerIcon(Textures.RESOURCE_PREFIX + Names.Items.MATTER + Names.Items.MATTER_SUBTYPES[i]);
+        }
+    }
+}

src/main/java/com/pahimar/ee3/reference/Names.java

@@ -33,6 +33,8 @@ public class Names
         public static final String DIVINING_ROD = "diviningRod";
         public static final String ALCHEMICAL_TOME = "alchemicalTome";
         public static final String GUIDE = "guide";
+        public static final String MATTER = "matter";
+        public static final String[] MATTER_SUBTYPES = {"Dark", "Corporeal", "Kinetic", "Temporal", "Essentia", "Amorphous", "Void", "Omni"};
     }
 
     public static final class NBT

src/main/resources/assets/ee3/lang/en_US.lang

@@ -25,6 +25,14 @@ item.ee3:alchemicalUpgrade.azure.name=Azure Upgrade
 item.ee3:alchemicalUpgrade.minium.name=Minium Upgrade
 item.ee3:alchemicalTome.name=Tome of Alchemical Knowledge [WIP]
 item.ee3:guide.name=Guide To Alchemy [WIP]
+item.ee3:matterDark.name=Dark Matter
+item.ee3:matterOmni.name=Omni Matter
+item.ee3:matterCorporeal.name=Corporeal Matter
+item.ee3:matterKinetic.name=Kinetic Matter
+item.ee3:matterTemporal.name=Temporal Matter
+item.ee3:matterEssentia.name=Essentia Matter
+item.ee3:matterAmorphous.name=Amorphous Matter
+item.ee3:matterVoid.name=Void Matter
 
 # Block localizations
 tile.ee3:alchemicalChest.name=Alchemical Chest