diff --git a/TODO.txt b/TODO.txt
index b016a44..5f2e81b 100644
--- a/TODO.txt
+++ b/TODO.txt
@@ -6,6 +6,9 @@ deco			No		Copper pots
 deco			No		Copper plates
 deco			No		Lanterns
 deco			No		Light plates
+deco			No		Limestone...
+							...stairs
+							...slabs
 -------------------------------------------------------------------------------------------------------
 plants			No?		Tomatoes
 plants			No?		Turnips
@@ -40,21 +43,24 @@ materials		No		Metal from slag
 							-> generate iron nuggets in furnace
 							-> random nuggets in alloy furnace
 -------------------------------------------------------------------------------------------------------
-materials.ores	No		Limestone
-materials.ores	No		Rock salt
-materials.ores	No		Tin (cassiterite)
-materials.ores	No		Zinc (sphalerite)
-materials.ores	No		Aluminium (bauxite)
-materials.ores	No		Silver (native, horn silver)
-materials.ores	No		Lead (galena)
+materials.rock	No		Smooth limestone
+-------------------------------------------------------------------------------------------------------
+materials.ore	No		Rock salt
+materials.ore	No		Tin (cassiterite)
+materials.ore	No		Zinc (sphalerite)
+materials.ore	No		Aluminium (bauxite)
+materials.ore	No		Silver (native, horn silver)
+materials.ore	No		Lead (galena)
 -------------------------------------------------------------------------------------------------------
 tech.base		No		Coke oven
 -------------------------------------------------------------------------------------------------------
-animals		???		Goats
+animals			???		Goats
 -------------------------------------------------------------------------------------------------------
-???			???		Sub-blocks
-???			Yes		Improved pistons
-???			???		Insulated redstone wires
-???			???		Electrical-like power
+world			???		Limestone hills / mountains
+-------------------------------------------------------------------------------------------------------
+???				???		Sub-blocks
+???				Yes		Improved pistons
+???				???		Insulated redstone wires
+???				???		Electrical-like power
 ???			???		Atlases
 ???			???		"Luggage" (chests with persistent contents)
\ No newline at end of file
diff --git a/src/java/mmm/materials/Materials.java b/src/java/mmm/materials/Materials.java
index 0f206dc..9f144af 100644
--- a/src/java/mmm/materials/Materials.java
+++ b/src/java/mmm/materials/Materials.java
@@ -4,6 +4,7 @@ package mmm.materials;
 import mmm.materials.ore.MOCopper;
 import mmm.materials.ore.MOCuprite;
 import mmm.materials.ore.MOMalachite;
+import mmm.materials.rock.MLimestone;
 import mmm.utils.I_URecipeRegistrar;
 import mmm.utils.URegistry;
 import net.minecraft.block.material.MapColor;
@@ -17,6 +18,7 @@ import net.minecraft.item.Item;
 public class Materials
 		implements I_URecipeRegistrar
 {
+	public static final MLimestone ROCK_LIMESTONE;
 
 	public static final MMetal GOLD;
 	public static final MMetal IRON;
@@ -33,6 +35,9 @@ public class Materials
 	public static final MOre ORE_CUPRITE;
 
 	static {
+		// Rocks
+		URegistry.addBlock( ROCK_LIMESTONE = new MLimestone( ) );
+
 		// Vanilla metals
 		GOLD = new MMetal( Blocks.GOLD_BLOCK , Items.GOLD_INGOT , Items.GOLD_NUGGET );
 		IRON = new MMetal( Blocks.IRON_BLOCK , Items.IRON_INGOT , //
diff --git a/src/java/mmm/materials/rock/MLimestone.java b/src/java/mmm/materials/rock/MLimestone.java
new file mode 100644
index 0000000..d4ea0bc
--- /dev/null
+++ b/src/java/mmm/materials/rock/MLimestone.java
@@ -0,0 +1,43 @@
+package mmm.materials.rock;
+
+
+import java.util.List;
+
+import mmm.utils.I_UOreGenerationRegistrar;
+import mmm.utils.URegistry;
+import mmm.world.WLocation;
+import mmm.world.WOreGenerationCondition;
+import mmm.world.WOreGenerationParameters;
+import net.minecraft.block.Block;
+import net.minecraft.block.SoundType;
+import net.minecraft.block.material.MapColor;
+import net.minecraft.block.material.Material;
+import net.minecraft.creativetab.CreativeTabs;
+
+
+
+public class MLimestone
+		extends Block
+		implements I_UOreGenerationRegistrar
+{
+
+	public MLimestone( )
+	{
+		super( Material.ROCK , MapColor.SNOW );
+		this.setCreativeTab( CreativeTabs.BUILDING_BLOCKS );
+		this.setHardness( 1f );
+		this.setResistance( 7.5f );
+		this.setSoundType( SoundType.STONE );
+		this.setHarvestLevel( "pickaxe" , 0 );
+		URegistry.setIdentifiers( this , "materials" , "rock" , "limestone" );
+	}
+
+
+	@Override
+	public void addConditions( final List< WOreGenerationCondition > conditions )
+	{
+		conditions.add( new WOreGenerationCondition( WLocation.inOverworld( ) ,
+				new WOreGenerationParameters( this.getDefaultState( ) , 15 , 40 ) ) );
+	}
+
+}
diff --git a/src/resources/assets/mmm/blockstates/materials/rock/limestone.json b/src/resources/assets/mmm/blockstates/materials/rock/limestone.json
new file mode 100644
index 0000000..523a2fd
--- /dev/null
+++ b/src/resources/assets/mmm/blockstates/materials/rock/limestone.json
@@ -0,0 +1,5 @@
+{
+    "variants": {
+        "normal": { "model": "mmm:materials/rock/limestone" }
+    }
+}
diff --git a/src/resources/assets/mmm/models/block/materials/rock/limestone.json b/src/resources/assets/mmm/models/block/materials/rock/limestone.json
new file mode 100644
index 0000000..02f20c6
--- /dev/null
+++ b/src/resources/assets/mmm/models/block/materials/rock/limestone.json
@@ -0,0 +1,6 @@
+{
+    "parent": "minecraft:block/cube_all",
+    "textures": {
+        "all": "mmm:blocks/materials/rock/limestone"
+    }
+}
\ No newline at end of file
diff --git a/src/resources/assets/mmm/models/item/materials/rock/limestone.json b/src/resources/assets/mmm/models/item/materials/rock/limestone.json
new file mode 100644
index 0000000..7e02bea
--- /dev/null
+++ b/src/resources/assets/mmm/models/item/materials/rock/limestone.json
@@ -0,0 +1,3 @@
+{
+    "parent": "mmm:block/materials/rock/limestone"
+}
\ No newline at end of file
diff --git a/src/resources/assets/mmm/textures/blocks/materials/rock/limestone.png b/src/resources/assets/mmm/textures/blocks/materials/rock/limestone.png
new file mode 100644
index 0000000..17e4b0c
Binary files /dev/null and b/src/resources/assets/mmm/textures/blocks/materials/rock/limestone.png differ