Amulet of chemistry

Amulet of chemistry
Released							2 February 2017 (Update)
Members							Yes
Quest item							No
Properties
Tradeable							Yes
Equipable							Yes
Stackable							No
Noteable							Yes
Options							Wear, Options, Break
Worn options							Options
Destroy							Drop
Examine							Useful when making potions - has the chance of giving an extra dose.
Values
Value							1,050 coins
High alch							630 coins
Low alch							420 coins
Weight							0.007 kg
Grand Exchange
Exchange							1,278 coins (info)
Buy limit							10,000
Daily volume							27,735
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Advanced data
Item ID							21163

An amulet of chemistry is a jade amulet enchanted via the Lvl-2 Enchant spell.

Each amulet begins with five charges. While the amulet is equipped, there is a 5% chance that you will create a 4-dose potion rather than a 3-dose potion when brewing potions (but with no extra experience), which consumes one charge. Once all of the amulet's charges are used up, the amulet crumbles to dust.

Similar to a ring of recoil, amulet of chemistry charges are stored per player, not per amulet. Thus if the player gets rid of an amulet with 1 charge remaining, the next amulet the player equips will still have only 1 charge. The player can right-click and "break" an amulet of chemistry, destroying it and restoring the next amulet of chemistry the player equips to 5 charges.

Attack bonuses
+0		+0		+0		+0		+0
Defence bonuses
+0		+0		+0		+0		+0
Other bonuses								Slot
+0		+0		+0%		+0		List

Creation

Requirements

Skill		Level	XP
Magic		27 (b)	37
Members		Ticks	1 (0.6s)

Materials

Item		Quantity	Cost
	Jade amulet	1	991
	Cosmic rune	1	163
	Air rune	3	15
Total Cost			1,169
	Amulet of chemistry	1	1,278
Profit			109

Mechanics

The amulet of chemistry provides no benefit when making potions that always output 4 doses, including antidote+, antidote++, anti-venom+, super combat potion, and super antifire.

When used with potions that create a variable number of doses, the amulet will only trigger if the input potion is less than 4 doses. These potions include stamina potion, extended antifire, extended super antifire, anti-venom, and all of the divine potions. When used with 3-dose potions, the amulet will extend 60 doses into 61 doses, providing an average 1.66% increase in yield and take 33% longer to make. For 2 dose potions, the amulet will extend 40 doses into 41 doses, providing an average 2.5% increase in yield and take 100% longer to make. For single dose potions, the amulet will extend 20 doses into 21 doses, providing an average 5% increase in yield and take 300% longer to make. This takes much more time, but can be useful extending supplies when acquiring ingredients takes a significant amount of time (such as on Ironmen accounts, or maximising profit from crystal dust).

Profit

When using the amulet for solely profit, it should only be used when a single dose of the potion you make has a value of more than 1/5th of the amulet's worth (255.6).

Potion		Single dose		One dose of (4)
		GE Price	Profit	GE Price	Profit
	Attack potion	3	−252.6	2.25	−253.35
	Antipoison	64	−191.6	53.75	−201.85
	Relicym's balm	150	−105.6	304	48.4
	Strength potion	77	−178.6	89.5	−166.1
	Serum 207	4	−251.6	4.5	−251.1
	Compost potion	59	−196.6	42.5	−213.1
	Restore potion	26	−229.6	28.5	−227.1
	Guthix balance	280	24.4	42	−213.6
	Energy potion	125	−130.6	138	−117.6
	Defence potion	109	−146.6	154.5	−101.1
	Agility potion	85	−170.6	73.25	−182.35
	Combat potion	122	−133.6	148.75	−106.85
	Prayer potion	3,188	2,932.4	3,172.75	2,917.15
	Super attack	41	−214.6	49.5	−206.1
	Superantipoison	82	−173.6	77.5	−178.1
	Fishing potion	43	−212.6	37.75	−217.85
	Super energy	537	281.4	519.5	263.9
	Hunter potion	1,219	963.4	1,370	1,114.4
	Super strength	478	222.4	533.5	277.9
	Super restore	3,698	3,442.4	3,975.5	3,719.9
	Super defence	236	−19.6	280.75	25.15
	Antifire potion	95	−160.6	125.5	−130.1
	Divine super attack	293	37.4	426.75	171.15
	Divine super strength	963	707.4	917	661.4
	Divine super defence	590	334.4	488	232.4
	Ranging potion	138	−117.6	163	−92.6
	Divine ranging potion	997	741.4	721	465.4
	Magic potion	56	−199.6	33.5	−222.1
	Divine magic potion	762	506.4	537.5	281.9
	Stamina potion	1,342	1,086.4	1,272.75	1,017.15
	Zamorak brew	817	561.4	1,060.75	805.15
	Bastion potion	2,760	2,504.4	2,928.5	2,672.9
	Battlemage potion	2,356	2,100.4	2,598.25	2,342.65
	Saradomin brew	1,751	1,495.4	1,826.5	1,570.9
	Extended antifire	49	−206.6	28.25	−227.35
	Anti-venom	872	616.4	1,540.75	1,285.15
	Divine super combat	4,604	4,348.4	4,046.75	3,791.15
	Extended super antifire	2,651	2,395.4	2,709.25	2,453.65

Changes

Date	Changes
27 July 2017 (update)	A toggle was added to stop making potions once the amulet breaks. The "Check" option was replaced with an "Options" option.
16 February 2017 (update)	The item's inventory sprite was rotated, so that unenchanted silver jewellery now has non-standard angles instead.
9 February 2017 (update)	The "Break" option was added.

Gallery (historical)

2 February 2017 – 16 February 2017	16 February 2017 – present