Perfect juju mining potion

A perfect juju mining potion is a potion made using the Herblore skill. It is made by combining a juju mining potion (3) with harmony moss, requiring 80 Herblore and giving 126.5 experience. This makes a three dose potion, which can then be decanted into other doses by talking to Bob Barter (herbs). It can also be turned into a six-dose Perfect juju mining flask by talking to Teplin Macagan with a potion flask.

Each dose of the potion lasts for one hour. While the potion is in effect, each ore mined gives a 10% chance of finding an enhanced stone spirit, which does the same thing as the regular juju mining potion (automatically banking ore), and also will smelt ore that the player mines. Coal is not affected by this effect and will be sent to the bank by the stone spirit. The stone spirit will also grant a 10% bonus experience while obtaining ores, including extra ores obtained with the Varrock armour and bonus ores gathered from concentrated coal and gold rocks. If you mine gold ore and wear goldsmith gauntlets at the same time, you will gain double exp for the gold ores smelted by the stone spirit. This allows for very fast and effective training in both Mining and Smithing at the same time. In addition to the bars received from smelting the mined ore, the stone spirit will also give extra ore as a gift to the player's bank. The ore's type may vary from that which was mined.

Also note that the spirit will only give you a gift of an ore that is higher level than the one you are mining, so if it activates while mining coal, you will receive either gold, mithril, adamant, or rune. If mining iron, you will get iron bars, not steel.

Crystallise spell also works with this potion by giving the 10% bonus experience to mining. However, anything it mines will not be banked or smelted by the effect of this potion. Additionally, extra ores from Varrock armour will be banked as they are not eaten by Crystallise.

Mining red or crystal-flecked sandstone will generate a random ore instead to the bank as well as bank the sandstone. It does not work while mining any places where regular Juju Mining potion does not work. Additionally, ores smelted from this potion do not stack with Perfect juju smithing potion.

One of the best places to use these for both the mining and smithing benefits is harmonised mithril, adamantite, or runite rocks in the Trahaearn Clan district, and it will quickly make up the cost of making/buying simply in saved coal.

Trivia

 * Prior to the update on 16 March 2015, Goldsmith gauntlets did not increase the experience received from gold bars that are smelted by the stone spirit.