diff --git a/src/pocketmine/block/Block.php b/src/pocketmine/block/Block.php
index a7aad0f82..e8b4ca587 100644
--- a/src/pocketmine/block/Block.php
+++ b/src/pocketmine/block/Block.php
@@ -221,7 +221,8 @@ class Block extends Position implements BlockIds, Metadatable{
 			self::$list[self::WOOD2] = Wood2::class;
 			self::$list[self::ACACIA_WOOD_STAIRS] = AcaciaWoodStairs::class;
 			self::$list[self::DARK_OAK_WOOD_STAIRS] = DarkOakWoodStairs::class;
-
+			self::$list[self::PRISMARINE] = Prismarine::class;
+			self::$list[self::SEA_LANTERN] = SeaLantern::class;
 			self::$list[self::IRON_TRAPDOOR] = IronTrapdoor::class;
 			self::$list[self::HAY_BALE] = HayBale::class;
 			self::$list[self::CARPET] = Carpet::class;
diff --git a/src/pocketmine/block/BlockIds.php b/src/pocketmine/block/BlockIds.php
index 415cddf5f..7e3810d93 100644
--- a/src/pocketmine/block/BlockIds.php
+++ b/src/pocketmine/block/BlockIds.php
@@ -161,6 +161,7 @@ interface BlockIds{
 	const BIRCH_WOOD_STAIRS = 135, BIRCH_WOODEN_STAIRS = 135;
 	const JUNGLE_WOOD_STAIRS = 136, JUNGLE_WOODEN_STAIRS = 136;
 
+	const BEACON = 138;
 	const COBBLESTONE_WALL = 139, COBBLE_WALL = 139, STONE_WALL = 139;
 	const FLOWER_POT_BLOCK = 140;
 	const CARROT_BLOCK = 141;
@@ -190,7 +191,8 @@ interface BlockIds{
 	const SLIME_BLOCK = 165;
 
 	const IRON_TRAPDOOR = 167;
-
+	const PRISMARINE = 168;
+	const SEA_LANTERN = 169;
 	const HAY_BALE = 170;
 	const CARPET = 171;
 	const HARDENED_CLAY = 172;
diff --git a/src/pocketmine/block/Prismarine.php b/src/pocketmine/block/Prismarine.php
new file mode 100644
index 000000000..164655b5a
--- /dev/null
+++ b/src/pocketmine/block/Prismarine.php
@@ -0,0 +1,65 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author Pocketmine Team
+ * @link http://www.pocketmine.net
+ *
+ *
+*/
+
+namespace pocketmine\block;
+
+use pocketmine\item\Item;
+use pocketmine\item\Tool;
+
+class Prismarine extends Solid{
+
+	const NORMAL = 0;
+	const DARK = 1;
+	const BRICKS = 2;
+
+	protected $id = self::PRISMARINE;
+
+	public function __construct($meta = 0){
+		$this->meta = $meta;
+	}
+
+	public function getHardness(){
+		return 1.5;
+	}
+
+	public function getName(){
+		static $names = [
+			self::NORMAL => "Prismarine",
+			self::DARK => "Dark Prismarine",
+			self::BRICKS => "Prismarine Bricks",
+		];
+		return $names[$this->meta & 0x0f];
+	}
+
+	public function getToolType(){
+		return Tool::TYPE_PICKAXE;
+	}
+
+	public function getDrops(Item $item){
+		if($item->isPickaxe() >= Tool::TIER_WOODEN){
+			return [
+				[$this->id, $this->meta & 0x0f, 1],
+			];
+		}else{
+			return [];
+		}
+	}
+}
\ No newline at end of file
diff --git a/src/pocketmine/block/SeaLantern.php b/src/pocketmine/block/SeaLantern.php
new file mode 100644
index 000000000..9abcba1b6
--- /dev/null
+++ b/src/pocketmine/block/SeaLantern.php
@@ -0,0 +1,53 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author Pocketmine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+*/
+
+namespace pocketmine\block;
+
+use pocketmine\item\Tool;
+use pocketmine\item\Item;
+
+class SeaLantern extends Solid{
+
+	protected $id = self::SEA_LANTERN;
+
+	public function __construct($meta = 0){
+		$this->meta = $meta;
+	}
+
+	public function getName(){
+		return "Sea Lantern";
+	}
+
+	public function getHardness(){
+		return 0.3;
+	}
+
+	public function getLightLevel(){
+		return 15;
+	}
+
+	public function getDrops(Item $item){
+		return [
+			[Item::PRISMARINE_CRYSTALS, 0, 3],
+		];
+	}
+
+}
\ No newline at end of file
diff --git a/src/pocketmine/item/Item.php b/src/pocketmine/item/Item.php
index 2c326e3da..e9f55799b 100644
--- a/src/pocketmine/item/Item.php
+++ b/src/pocketmine/item/Item.php
@@ -212,6 +212,9 @@ class Item implements ItemIds, \JsonSerializable{
 			self::$list[self::BEETROOT] = Beetroot::class;
 			self::$list[self::BEETROOT_SEEDS] = BeetrootSeeds::class;
 			self::$list[self::BEETROOT_SOUP] = BeetrootSoup::class;
+			self::$list[self::PRISMARINE_CRYSTALS] = PrismarineCrystals::class;
+			self::$list[self::PRISMARINE_SHARD] = PrismarineShard::class;
+			self::$list[self::NETHER_STAR] = NetherStar::class;
 
 			for($i = 0; $i < 256; ++$i){
 				if(Block::$list[$i] !== null){
@@ -799,7 +802,7 @@ class Item implements ItemIds, \JsonSerializable{
 			$tag->tag = clone $this->getNamedTag();
 			$tag->tag->setName("tag");
 		}
-		
+
 		if($slot !== -1){
 			$tag->Slot = new ByteTag("Slot", $slot);
 		}
diff --git a/src/pocketmine/item/ItemIds.php b/src/pocketmine/item/ItemIds.php
index bf8460096..4ecf60d32 100644
--- a/src/pocketmine/item/ItemIds.php
+++ b/src/pocketmine/item/ItemIds.php
@@ -167,7 +167,7 @@ interface ItemIds extends BlockIds{
 	const GOLDEN_CARROT = 396;
 	const MOB_HEAD = 397, SKULL = 397;
 	const CARROT_ON_A_STICK = 398;
-
+	const NETHER_STAR = 399;
 	const PUMPKIN_PIE = 400;
 
 	const ENCHANTED_BOOK = 403;
@@ -176,7 +176,9 @@ interface ItemIds extends BlockIds{
 	const QUARTZ = 406;
 	const NETHER_QUARTZ = 406;
 	const MINECART_WITH_TNT = 407;
-	const MINECART_WITH_HOPPER = 408, HOPPER = 410;
+	const MINECART_WITH_HOPPER = 408;
+	const PRISMARINE_SHARD = 409;
+	const HOPPER = 410;
 	const RAW_RABBIT = 411;
 	const COOKED_RABBIT = 412;
 	const RABBIT_STEW = 413;
@@ -188,7 +190,7 @@ interface ItemIds extends BlockIds{
 	const DIAMOND_HORSE_ARMOR = 419;
 	const LEAD = 420, LEASH = 420;
 	const NAMETAG = 421;
-
+	const PRISMARINE_CRYSTALS = 422;
 	const RAW_MUTTON = 423;
 	const COOKED_MUTTON = 424;
 
diff --git a/src/pocketmine/item/NetherStar.php b/src/pocketmine/item/NetherStar.php
new file mode 100644
index 000000000..26dddb73f
--- /dev/null
+++ b/src/pocketmine/item/NetherStar.php
@@ -0,0 +1,29 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author Pocketmine Team
+ * @link http://www.pocketmine.net
+ *
+ *
+*/
+
+namespace pocketmine\item;
+
+
+class NetherStar extends Item{
+	public function __construct($meta = 0, $count = 1){
+		parent::__construct(self::NETHER_STAR, $meta, $count, "Nether Star");
+	}
+}
\ No newline at end of file
diff --git a/src/pocketmine/item/PrismarineCrystals.php b/src/pocketmine/item/PrismarineCrystals.php
new file mode 100644
index 000000000..b7f3edfed
--- /dev/null
+++ b/src/pocketmine/item/PrismarineCrystals.php
@@ -0,0 +1,29 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author Pocketmine Team
+ * @link http://www.pocketmine.net
+ *
+ *
+*/
+
+namespace pocketmine\item;
+
+
+class PrismarineCrystals extends Item{
+	public function __construct($meta = 0, $count = 1){
+		parent::__construct(self::PRISMARINE_CRYSTALS, $meta, $count, "Prismarine Crystals");
+	}
+}
\ No newline at end of file
diff --git a/src/pocketmine/item/PrismarineShard.php b/src/pocketmine/item/PrismarineShard.php
new file mode 100644
index 000000000..9f6a92f5d
--- /dev/null
+++ b/src/pocketmine/item/PrismarineShard.php
@@ -0,0 +1,29 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author Pocketmine Team
+ * @link http://www.pocketmine.net
+ *
+ *
+*/
+
+namespace pocketmine\item;
+
+
+class PrismarineShard extends Item{
+	public function __construct($meta = 0, $count = 1){
+		parent::__construct(self::PRISMARINE_SHARD, $meta, $count, "Prismarine Shard");
+	}
+}
\ No newline at end of file