Mithril ore rocks

A mithril rock, also called mithrite, is a rock that can be mined through the Mining skill in various places throughout RuneScape.

Mithril ore can be mined with a Mining level of 55 or higher, granting 80 Mining experience and one Mithril ore. After being mined, a mithril rock takes an average of 3 minutes to respawn.

Free-to-Play

 * Bandit camp mining site - 22 rocks (WARNING: beyond Level 30 Wilderness!)
 * Dwarven Mine resource dungeon - 6 rocks
 * Mining Guild - 5 rocks
 * West Lumbridge Swamp mining site - 5 rocks
 * Al Kharid mining site - 3 rocks
 * Dwarven Mine - 2 rocks
 * Edgeville dungeon mine - 1 rock
 * North Crandor mining site - 1 rock
 * South Crandor mining site - 7 rocks
 * Mining Guild resource dungeon - 8 rocks (Requires 60 Mining and 45 Dungeoneering)

Members Locations

 * Ancient Cavern in the Mithril dragon area - 14 rocks (WARNING: Guarded by level 160 mithril dragons.)
 * Desert Mining Camp underground mine - 3 rocks
 * Evil Chicken's Lair - 2 rocks
 * Fight Arena mining site - 3 rocks
 * Grand Tree mine - 4 rocks
 * Heroes' Guild mine - 2 rocks
 * Jatizso mine - 16 rocks (18 with Fremennik sea boots 4)
 * Port Khazard mining site - 4 rocks
 * TzHaar mine - 3 rocks
 * Keldagrim entrance mining site - 2 rocks

Respawn Rate
Mithril ore, like all other mined rocks, respawns at a rate inversely proportional to the number of people in the rock's RuneScape world. If the world is empty, the ore respawns in 4 minutes; if it is full (with 2000 players), it respawns in 2 minutes.

$$4-\frac{x}{1000}$$