High Level Alchemy

High Level Alchemy (high alch, or alching) is a non-combat Magic spell used to convert items into coins at the best price a player could get from a specialty store. The amount of coins generated is normally 50% more than the general store or Low Alchemy gives.

High level alchemy costs coins to cast but is reduced to  coins to cast with a fire staff.

High Level Alchemy is a popular way for mid and high level mages to train their Magic level, by buying or making valuable items and nature runes, then casting the spell on the items. For example, a player might buy or make yew longbows and cast High Level Alchemy on them. In this case, the player may consume approximately 290 coins per bow, or if they made them, make a profit. For Free Players, it is suggested that they cast the spell on adamant platebodies or Rune hatchets. For a list of commonly alchemised items, please see the High Alchemy calculator.

High Alchemy takes 5 game ticks, or 3 seconds, to cast. It can be cast up to exactly 1200 times in one hour, although in practice many people cast a little less, due to lag and timing issues. In the past, users had to time this spell casting so that they could maximize the number of alchs/hour (similarly to burying bones at double speed). However, Jagex implemented a spell-cast queue for this spell, so players just have to cast it while the player is busy with it and the character will automatically queue one more cast.

In the past, Castle Wars was a favourite location for casting this spell, because the 20 minute time limit provided a reasonable amount of measurement. It was also enjoyable for the players to watch others fight. Due to player complaints about other players free-loading this way, this spell can no longer be cast inside a Castle Wars activity. However, people still go along the walls of castle wars and cast alchemy spells, as you can still get somewhat of a show as you do it. Soul Wars is now a very popular place to alch because there is a lack of random events.

High (and Low) Alchemy can be cast on noted items, saving much withdrawal time from the bank, and simplifying the "click pattern". Also, it should be noted that High Alchemy only grants 65 experience, regardless of the rarity or expensiveness of the item you are alchemising. For example, high-alchemising a Bronze bar grants no less experience than high-alchemising a Rune bar.

In practice, a player might prefer training magic with High Level Alchemy by buying items from other players, which usually results in more coins being created than paid for the converted item. This is widely regarded as a major cause of inflation in the game.

Some items, such as rares, are worth far more on the street than in the store. Prior to the 9th November 2009 update, it was inadvisable for players to carry such items in their inventory, as accidentally alchemising them would cause a major loss for the player. A warning message now appears if the player tries to cast high level alchemy on something worth 500k or more on the Grand Exchange.

Casting alchemy spells on stackable items will only alchemise one at a time; on RuneScape Classic, it alchemises the entire stack at once.

Casting High Level Alchemy inside a Dungeoneering dungeon grants 6.5 experience (10% of 65).

It is recomended to use hati gloves while doing alchemy because of the x2 xp bonus.

During the week of 4 April 2008, Jagex altered the way High Level Alchemy and Low Level Alchemy function so as to render them inoperable while standing inside the Barrows crypt areas.

On 19 May 2009, Jagex updated low and high alchemy so that if a person clicks too early, the early click will not disrupt the alchemy process. 

MouseKeys in XP/Vista/7 and Mac OS X
One option to reduce the effort when using High Alchemy on hundreds or thousands of items in a session is to enable an accessibility feature of Microsoft Windows called MouseKeys. This allows the '5' key on the number pad to be used as a substitute for clicking the left mouse button. To enable the feature on Windows XP (also works on Vista and Windows 7) hold down the Left Shift, Left Alt and Numlock keys simultaneously to show the MouseKeys dialogue and then click setting-setting in lower part select when numlock is off then click the OK button. Press the Left Shift, Left Alt, and Numlock again and then click ok. The cursor can then be controlled by moving the mouse device as normal, or by holding down the numbers around '5' on the number pad, and clicking can be performed by pressing '5' on the number pad.

Mac OS X users can do the same thing by using Universal Access in System Preferences. In Mac OS X's Universal Access window, select the Mouse & Trackpad pane and then turn on Mouse Keys. With Mouse Keys turned on, you can navigate around using the number keys on the number pad and mouse-click with the 5 key. If using a laptop make sure you turn on the key pad by using the function key and hitting number lock (unless you have a number lock key which is on the 17" notepads), then you can use the '5' key which is usually the 'I' button or in that general area.

A similar feature can be turned on in Linux (Gnome or KDE) by pressing Left-Shift and Num Lock at the same time.

By positioning the items to be alchemised (in note form) on the left hand side of the fourth inventory row it is possible to repeatedly cast High Alchemy on the items by doing nothing more than pressing the '5' key at the correct intervals. It is also possible to press the '+' key, which double clicks, meaning both the alchemy spell and the item are clicked, requiring fewer clicks and with no mouse movement required.

Note: Now that you can organise your spellbook (combat, teleport, miscellaneous, skill) spells, you can just as easily put the item you are going to alchemise into the first slot of the first inventory row instead of the fourth row. This is a lot easier to do.

Coins gained from High Alchemy
All items in RuneScape have a fixed amount of coins that the High Level Alchemy spell yields (with the exception of quest items that cannot be alchemised). Some can turn a profit, but most will provide much less money than if they were sold to another player. There is a short, constantly updating, list of profitable high alchemy items here. See also a list of suggested items to cast High Level Alchemy on here.

Trivia

 * After the high detail update in July 2008, the animation for High Level Alchemy was updated. There was debate about whether the new animation was slower or faster than the old animation, but in fact the new animation is exactly the same speed as the old one at 5 game ticks per cast.
 * In issue 14 of The God Letters, Saradomin mentions that casting the High Level Alchemy spell is a serious crime.
 * The lowest price of any item on the grand exchange will never drop past 400 coins less than the high alchemy value. There are a few items at this limit which high level alchemy can be cast on for a profit.
 * Coins cannot be alchemised. If the spell is cast on coins, the message reads: "Coins are already made of gold...", even though players can still alchemy other items made of gold, such as Gold bars, Gold ores, or Nuggets.
 * The animation for High Level Alchemy is different for players wearing staffs than for players wearing other kinds of weapons, or no weapon at all.
 * If a player casts High Level Alchemy with no spaces in his or her inventory, the resulting coins are put on the ground.
 * When a player casts high level alchemy their head tilts a little.
 * Sacred clay armour does not affect the amount of experience gained.
 * Neither of the Alchemy spells can be used in the Mahjarrat Ritual Site Cavern.
 * The formula for profit/deficiency from casting High Alchemy is $$profit = high\;alchemy\;value - (cost\;of\;nature\;rune + cost\;of\;item)$$. A positive result indicates a profit, while a negative result indicates a loss. If you were to cast High Level Alchemy on a maple longbow (u) for example, the profit would be $$192 - (223 + 110) = -131gp$$. If you are not using a staff of fire, subtract the cost of 5 fire runes from this value.
 * When you use the high-alchemy option from your Explorer's Ring, the animation is different in colour. (shown in the right image) High+Alch.jpg
 * When you level up with this spell, the orange alchemy "ball" above your staff (if wielding one) is not shown.
 * If you are in the random event Gravedigger, when you try to cast High Alchemy on one of those coffins, it will say "You can't cast this spell here".
 * When attempting to cast the Alchemy spell on the runes in your inventory, providing you only have the runes for one alchmey spell, you get a message saying "you do not have enough Runes to cast this spell"
 * When attempting to perform the above with a nature rune, the Nature and rune in Nature rune are both capitilized, however, this is not true for the fire rune, nothing is capitilized in fire rune.

Glitches

 * If you walk while casting High Level Alchemy with a staff, you move with the staff on the ground, dragging it.
 * A similar glitch is produced (as shown on the right) when the current alchemy animation has not yet finished as the next cast begins (this can happen often if the player's connection quality is poor). The second cast displays an animation without the player's character moving. The Superheat Item spell also suffers from this glitch, as does the Lunar spell Humidify.
 * Also if going down stairs while alching you will do the alch without doing the emote.
 * If you go to a P.O.H. and they have a slimy water pit, and you fall in it, you are able to cast High alchemy while swimming.High alch glitch.gif