Amulet of chemistry

The RuneScape Wiki also has an article on: rsw:Botanist's amulet

Amulet of chemistry
Released							2 February 2017 (Update)
Members							Yes
Quest item							No
Properties
Tradeable							Yes
Equipable							Yes
Stackable							No
Noteable							Yes
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							1,115 coins (info)
Buy limit							10,000
Daily volume							42,834
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Advanced data
Item ID							21163

Amulet of chemistry? (edit)? (edit)File:Amulet of chemistry.png2 February 2017 (Update)? (edit)YesNoYes? (edit)? (edit)YesNoYes? (edit)DropUseful when making potions - has the chance of giving an extra dose.10501,050 coinstrue630 coins420 coins6300.0070.007 kgtrueAmulet of chemistry11151,115 coins (info)infobox-cell-shown10,0001000042,834

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2116321163? (edit)? (edit)? (edit)

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 sells or casts High Level Alchemy on an amulet with 1 charge remaining, the next amulet the player equips will still have only 1 charge. The player can right-click to "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

+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0%0neckList? (edit)? (edit)? (edit)? (edit)? (edit)119? (edit)? (edit)

Creation

Requirements

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

Materials

Item		Quantity	Cost
	Jade amulet	1	778
	Cosmic rune	1	129
	Air rune	3	15
Total Cost			922
	Amulet of chemistry	1	1,115
Profit			193

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 (223).

Potion		Single dose		One dose of (4)
		GE Price	Profit	GE Price	Profit
	Attack potion	3	-220	1.5	-221.5
	Antipoison	61	-162	61	-162
	Relicym's balm	243	20	246.5	23.5
	Strength potion	64	-159	69.25	-153.75
	Serum 207	1	-222	1.25	-221.75
	Compost potion	112	-111	91.25	-131.75
	Restore potion	35	-188	21.5	-201.5
	Guthix balance	261	38	59.5	-163.5
	Energy potion	114	-109	129.75	-93.25
	Defence potion	102	-121	93.5	-129.5
	Agility potion	125	-98	65.5	-157.5
	Combat potion	64	-159	59.5	-163.5
	Prayer potion	2,174	1,951	2,220.25	1,997.25
	Super attack	38	-185	39.25	-183.75
	Superantipoison	81	-142	67.5	-155.5
	Fishing potion	51	-172	42.25	-180.75
	Super energy	508	285	499	276
	Hunter potion	1,167	944	1,066	843
	Super strength	489	266	466	243
	Super restore	2,470	2,247	2,539.25	2,316.25
	Super defence	223	0	246	23
	Antifire potion	47	-176	44.25	-178.75
	Divine super attack	508	285	176	-47
	Divine super strength	884	661	576.5	353.5
	Divine super defence	784	561	356.25	133.25
	Ranging potion	105	-118	95.25	-127.75
	Divine ranging potion	358	135	323.5	100.5
	Magic potion	57	-166	50.75	-172.25
	Divine magic potion	472	249	340.25	117.25
	Stamina potion	1,421	1,198	1,406.5	1,183.5
	Zamorak brew	871	648	382.5	159.5
	Bastion potion	2,087	1,864	2,326	2,103
	Battlemage potion	1,605	1,382	2,019	1,796
	Saradomin brew	1,775	1,552	1,793.75	1,570.75
	Extended antifire	221	-2	207.25	-15.75
	Anti-venom	1,192	969	1,167	944
	Divine super combat	3,762	3,539	3,602.5	3,379.5
	Extended super antifire	2,687	2,464	2,755	2,532