Adamantite ore

Written by All, Grand Exchange

Adamantite ore is an item used for Smithing and can be obtained by mining adamantite rocks at 70 Mining. It grants 95 Mining experience when mined. It is rarely used for training Mining, as the long respawn time of 4 minutes leads to only around 1,425 experience an hour if only mining one rock. It is mined most efficiently along with mithril in the Jatizso mine; however, it is not recommended as the mine is inhabited by aggressive level 128 Ice trolls. It is easy to obtain in both the Al Kharid and West Lumbridge Swamp mine, but the Al Kharid Mine has level 14 scorpions, which are aggressive to those under 29 combat.

Players with 70 Smithing can use one adamant ore and 6 coal in a furnace to create an adamantite bar, granting 37.5 Smithing experience. 
, Adamantite ore can be found in different mining sites around RuneScape such as:
, Other places:
, As of 17 July 2014 and according to the Boss Pets and Spawn Rates update:
, That means adamant ore spawns at a standardised spawn rate, which is 4 minutes after it was last mined, no matter how many players are on a world. Whether it’s zero or 2000 players in a single server, all ore across the game will respawn at the same rate.

Adamantite ore can also be dropped by monsters that access the rare drop table.