diff --git a/runelite-client/src/main/java/net/runelite/client/game/ItemManager.java b/runelite-client/src/main/java/net/runelite/client/game/ItemManager.java
index 0afcf162db..ff22e90cf9 100644
--- a/runelite-client/src/main/java/net/runelite/client/game/ItemManager.java
+++ b/runelite-client/src/main/java/net/runelite/client/game/ItemManager.java
@@ -28,6 +28,7 @@ import com.google.common.cache.CacheBuilder;
 import com.google.common.cache.CacheLoader;
 import com.google.common.cache.LoadingCache;
 import com.google.common.collect.ImmutableMap;
+import io.reactivex.Completable;
 import io.reactivex.schedulers.Schedulers;
 import java.awt.Color;
 import java.awt.image.BufferedImage;
@@ -192,6 +193,13 @@ public class ItemManager
 
 		eventbus.subscribe(GameStateChanged.class, this, this::onGameStateChanged);
 		eventbus.subscribe(PostItemDefinition.class, this, this::onPostItemDefinition);
+
+		Completable.fromAction(ItemVariationMapping::load)
+			.subscribeOn(Schedulers.computation())
+			.subscribe(
+				() -> log.debug("Loaded {} item variations", ItemVariationMapping.getSize()),
+				ex -> log.warn("Error loading item variations", ex)
+			);
 	}
 
 	private void loadPrices()
diff --git a/runelite-client/src/main/java/net/runelite/client/game/ItemVariationMapping.java b/runelite-client/src/main/java/net/runelite/client/game/ItemVariationMapping.java
index 9629bd99ac..7ebc2818dd 100644
--- a/runelite-client/src/main/java/net/runelite/client/game/ItemVariationMapping.java
+++ b/runelite-client/src/main/java/net/runelite/client/game/ItemVariationMapping.java
@@ -26,44 +26,20 @@
 package net.runelite.client.game;
 
 import com.google.common.collect.ImmutableMap;
-import com.google.gson.Gson;
-import com.google.gson.reflect.TypeToken;
-import java.io.InputStream;
+import com.google.gson.stream.JsonReader;
+import java.io.IOException;
 import java.io.InputStreamReader;
-import java.util.Collection;
-import java.util.Iterator;
+import java.nio.charset.StandardCharsets;
 import java.util.Map;
+import lombok.extern.slf4j.Slf4j;
 
 /**
  * Converts variation items to it's base item counterparts
  */
+@Slf4j
 public class ItemVariationMapping
 {
-	private static final Map<Integer, Integer> MAPPINGS;
-
-	static
-	{
-		final Gson gson = new Gson();
-		final TypeToken<Map<String, Collection<Integer>>> typeToken = new TypeToken<Map<String, Collection<Integer>>>()
-		{
-		};
-
-		final InputStream geLimitData = ItemVariationMapping.class.getResourceAsStream("/item_variations.json");
-		final Map<String, Collection<Integer>> itemVariations = gson.fromJson(new InputStreamReader(geLimitData), typeToken.getType());
-
-		ImmutableMap.Builder<Integer, Integer> builder = new ImmutableMap.Builder<>();
-		for (Collection<Integer> value : itemVariations.values())
-		{
-			final Iterator<Integer> iterator = value.iterator();
-			final int base = iterator.next();
-
-			while (iterator.hasNext())
-			{
-				builder.put(iterator.next(), base);
-			}
-		}
-		MAPPINGS = builder.build();
-	}
+	private static Map<Integer, Integer> MAPPINGS;
 
 	/**
 	 * Get base item id for provided variation item id.
@@ -75,4 +51,39 @@ public class ItemVariationMapping
 	{
 		return MAPPINGS.getOrDefault(itemId, itemId);
 	}
+
+	static void load() throws IOException
+	{
+		try (JsonReader reader = new JsonReader(new InputStreamReader(ItemVariationMapping.class.getResourceAsStream("/item_variations.json"), StandardCharsets.UTF_8)))
+		{
+			ImmutableMap.Builder<Integer, Integer> builder = ImmutableMap.builderWithExpectedSize(5039);
+			reader.beginObject();
+
+			while (reader.hasNext())
+			{
+				// Names are useless
+				reader.skipValue();
+				reader.beginArray();
+
+				int base = reader.nextInt();
+				while (reader.hasNext())
+				{
+					builder.put(
+						reader.nextInt(),
+						base
+					);
+				}
+
+				reader.endArray();
+			}
+
+			reader.endObject();
+			MAPPINGS = builder.build();
+		}
+	}
+
+	static int getSize()
+	{
+		return MAPPINGS.size();
+	}
 }
diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/highalchemy/HighAlchemyOverlay.java b/runelite-client/src/main/java/net/runelite/client/plugins/highalchemy/HighAlchemyOverlay.java
index d4de57b30e..92e24a96fd 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/highalchemy/HighAlchemyOverlay.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/highalchemy/HighAlchemyOverlay.java
@@ -56,9 +56,9 @@ public class HighAlchemyOverlay extends WidgetItemOverlay
 		this.itemManager = itemManager;
 		this.plugin = plugin;
 
-		int natPrice = itemManager.getItemPrice(ItemID.NATURE_RUNE);
+		int natPrice = itemManager.getItemPrice(ItemID.NATURE_RUNE, true);
 		this.alchPrice = natPrice;
-		this.alchPriceNoStaff = natPrice + 5 * itemManager.getItemPrice(ItemID.FIRE_RUNE);
+		this.alchPriceNoStaff = natPrice + 5 * itemManager.getItemPrice(ItemID.FIRE_RUNE, true);
 
 		showOnBank();
 		showOnInventory();
diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/stonedtracker/StonedTrackerPlugin.java b/runelite-client/src/main/java/net/runelite/client/plugins/stonedtracker/StonedTrackerPlugin.java
index 0a2523f6d1..56fceb8de3 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/stonedtracker/StonedTrackerPlugin.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/stonedtracker/StonedTrackerPlugin.java
@@ -77,10 +77,13 @@ public class StonedTrackerPlugin extends Plugin
 
 	@Inject
 	private ClientToolbar clientToolbar;
+
 	@Inject
 	public StonedTrackerConfig config;
+
 	@Inject
 	private Client client;
+
 	@Inject
 	private ItemManager itemManager;