diff --git a/src/main/java/com/sk89q/worldedit/EditSession.java b/src/main/java/com/sk89q/worldedit/EditSession.java
index 00b55c979..c236cd29d 100644
--- a/src/main/java/com/sk89q/worldedit/EditSession.java
+++ b/src/main/java/com/sk89q/worldedit/EditSession.java
@@ -2369,40 +2369,21 @@ public class EditSession {
 
     /**
      * Returns the highest solid 'terrain' block which can occur naturally.
-     * Looks at: 1, 2, 3, 7, 12, 13, 14, 15, 16, 56, 73, 74, 87, 88, 89, 82
-     * 
+     *
      * @param x
      * @param z
      * @param minY
      *            minimal height
      * @param maxY
      *            maximal height
+     * @param naturalOnly look at natural blocks or all blocks
      * @return height of highest block found or 'minY'
      */
     public int getHighestTerrainBlock(int x, int z, int minY, int maxY, boolean naturalOnly) {
         for (int y = maxY; y >= minY; --y) {
             Vector pt = new Vector(x, y, z);
             int id = getBlockType(pt);
-            if (naturalOnly ?
-                    id == 1 // stone
-                    || id == 2 // grass
-                    || id == 3 // dirt
-                    || id == 7 // bedrock
-                    || id == 12 // sand
-                    || id == 13 // gravel
-                    || id == 82 // clay
-                    // hell
-                    || id == 87 // netherstone
-                    || id == 88 // slowsand
-                    || id == 89 // lightstone
-                    // ores
-                    || id == 14 // coal ore
-                    || id == 15 // iron ore
-                    || id == 16 // gold ore
-                    || id == 56 // diamond ore
-                    || id == 73 // redstone ore
-                    || id == 74 // redstone ore (active)
-                    : !BlockType.canPassThrough(id)) {
+            if (naturalOnly ? BlockType.isNaturalBlock(id) : !BlockType.canPassThrough(id)) {
                 return y;
             }
         }
diff --git a/src/main/java/com/sk89q/worldedit/blocks/BlockType.java b/src/main/java/com/sk89q/worldedit/blocks/BlockType.java
index 002f2841c..d234394c0 100644
--- a/src/main/java/com/sk89q/worldedit/blocks/BlockType.java
+++ b/src/main/java/com/sk89q/worldedit/blocks/BlockType.java
@@ -594,4 +594,32 @@ public enum BlockType {
         }
         return dropped;
     }
+
+    /**
+     * Checks if the block type is "natural"
+     *
+     * @param id
+     * @return
+     */
+    public static boolean isNaturalBlock(int id) {
+        return id == 1 // stone
+                || id == 2 // grass
+                || id == 3 // dirt
+                || id == 7 // bedrock
+                || id == 12 // sand
+                || id == 13 // gravel
+                || id == 82 // clay
+                // hell
+                || id == 87 // netherstone
+                || id == 88 // slowsand
+                || id == 89 // lightstone
+                // ores
+                || id == 14 // coal ore
+                || id == 15 // iron ore
+                || id == 16 // gold ore
+                || id == 21 // lapis ore
+                || id == 56 // diamond ore
+                || id == 73 // redstone ore
+                || id == 74; // redstone ore (active)
+    }
 }