Dondakan's mine

The Arzinian Mine is located in the mines just southwest of the dwarven capital city of Keldagrim. To access the mines, players must have completed the quest Between a Rock... and have a Gold helmet equipped. They must then speak to Dondakan, a dwarf which stands near the entrance. He will then shoot them into the mine via his dwarf multicannon. To leave the mine, simply unequip the helmet or log out.

Description
The Arzinian Mine contains the most concentrated number of gold rocks and gold veins in all of RuneScape, numbering in at 146 rocks, making it the largest mine in the entire game! There are very few mines containing more than a few gold rocks, and gold respawns fairly slowly, so gold can be difficult to obtain in bulk. The Arzinian Mine is unique because it not only is a massive source of gold, but it also gives players a convenient method of banking the ores. Because of this, it is one of the most popular gold mining areas amongst players. However, because of its quest requirement and the larger market for coal and high-level ores compared to the relatively small demand for gold ores, the mine is usually empty, and players can have the entire mine to themselves in most worlds.

The mine's long distance from a bank can at first appear to ruin the mine. Fortunately, however, a nearby dwarf (Dwarven Boatman, east of the mine entrance) banks the player's gold ore for a charge. He charges 20% of the gold ores, rounded up. For example, if the player gives him 25 gold ores, he will charge 5 gold ores. If the player gives him 26, 27 or 28 gold ores, then he will charge 6 gold ores.

If the player is wearing Ring of Charos (a), then the dwarf will only charge 10% of the gold ores (rounded up). This is highly recommended, as the regular cost can quickly add up.

The nearby city of Keldagrim greatly attributes to the mine's usefulness. The city boasts many features that will prove useful to players while mining in the gold. Amongst these features are the blast furnace, a bank, an ore shop, a general store, a hammer respawn, and five anvils.

Tips

 * 1) Players will find their run energy lasts much longer (for running to/from the Dwarven Boatman) if they equip weight-saving items (e.g. Spotted cape, Spottier cape, Penance gloves, and/or Boots of lightness). This permits longer running time, shortening the time each load & trip takes.
 * 2) Completing the Varrock Achievement Diary up to medium level allows players to acquire Varrock armour 2. This gives players ~10% chance of Mining 2 gold ores per rock - yielding double experience too.
 * 3) Instead of removing the helmet to exit from the Arzinian mine, players can simply log out from Runescape. This will cause them to exit the mine, enabling them to carry one extra gold ore to the boatman!  The disadvantage to this of course is the time taken to log back in.

Trivia
The area of memory that Jagex uses for the mine is near the area that it uses for the Burgh de Rott Ramble and Temple Trekking miniquests. If you stand in certain places in the mine, you can see the path and the weeds (part of the boundaries) that are used in the aforementioned minigames.