diff --git a/src/main/java/appeng/entity/EntityChargedQuartz.java b/src/main/java/appeng/entity/EntityChargedQuartz.java
index 58afcc44..37f93811 100644
--- a/src/main/java/appeng/entity/EntityChargedQuartz.java
+++ b/src/main/java/appeng/entity/EntityChargedQuartz.java
@@ -74,7 +74,7 @@ public final class EntityChargedQuartz extends AEBaseEntityItem
 		this.delay++;
 
 		final int j = MathHelper.floor_double( this.posX );
-		final int i = MathHelper.floor_double( this.posY );
+		final int i = MathHelper.floor_double( (this.getBoundingBox().minY + this.getBoundingBox().maxY) / 2.0D );
 		final int k = MathHelper.floor_double( this.posZ );
 
 		final Material mat = this.worldObj.getBlock( j, i, k ).getMaterial();
diff --git a/src/main/java/appeng/entity/EntityGrowingCrystal.java b/src/main/java/appeng/entity/EntityGrowingCrystal.java
index 6fe79e91..666157bc 100644
--- a/src/main/java/appeng/entity/EntityGrowingCrystal.java
+++ b/src/main/java/appeng/entity/EntityGrowingCrystal.java
@@ -72,7 +72,7 @@ public final class EntityGrowingCrystal extends EntityItem
 		if( gc instanceof IGrowableCrystal ) // if it changes this just stops being an issue...
 		{
 			final int j = MathHelper.floor_double( this.posX );
-			final int i = MathHelper.floor_double( this.posY );
+			final int i = MathHelper.floor_double( (this.getBoundingBox().minY + this.getBoundingBox().maxY) / 2.0D );
 			final int k = MathHelper.floor_double( this.posZ );
 
 			final Block blk = this.worldObj.getBlock( j, i, k );