Limestone

Limestone is a stone which is used in several Skills, (e.g., Mining, Crafting, and Construction) as well as quests.

Mining
It can be mined by a player with a Mining level of 10, and gives 26.5 Mining experience when mined.

There are only two locations at which it can be mined:
 * the limestone quarry west of the temple Paterdomus and northeast of Varrock
 * the white rocks near the dire wolves in northeast Tirannwn between the walled city of Prifddinas and road in Arandar.

When smelting the limestone the text "I see no reason to do this." will appear in the chat window, but it used to inflict 8 points of damage.

Mining limestone in the quarry near the Paterdomus is one of the easy tasks in the Varrock Diary.

Crafting
Limestone can be crafted into limestone bricks at Crafting level 12 (gives 6 Crafting experience) when used with a chisel, although it may accidentally become a rock.

Building the Temple of Mort'ton in the Shades of Mort'ton (minigame) gives 5 Crafting experience for each brick laid.

Construction
It's also used in Construction.

Limestone can also be purchased from Razmire Keelgan's builders store in Mort'ton for 10 coins.

Quests
It is required in the Regicide quest to make quicklime to make a barrel bomb. Can also be bought from stonesman in Keldagrim just south of the west bank for 21 coin for Limestone brick

Examine text
For "Pile of Rock": For "Limestone":
 * Prospect - "This rock contains limestone."
 * Examine - "A pile of lime rock."
 * Examine - "Some limestone."