Added block break tool type, fixed falling sand, fixed duplicated jungle leaves

src/pocketmine/block/Emerald.php

@@ -22,6 +22,7 @@
 namespace pocketmine\block;
 
 use pocketmine\item\Item;
+use pocketmine\item\Tool;
 
 class Emerald extends Solid{
 
@@ -35,6 +36,10 @@ class Emerald extends Solid{
 		return 5;
 	}
 
+	public function getToolType(){
+		return Tool::TYPE_PICKAXE;
+	}
+
 	public function getName(){
 		return "Emerald Block";
 	}