Mining

Added sandstone. You get it by clicking a sand... block, I guess? with itself, and it'll convert the sand and all sand on that tile to sandstone bricks.
Added mineral doors. They have a cool sound effect, can't be opened by AI or critters (including bots, carps and huggers), but can't be locked either.
Blatantly stole DF music for ambience because I'm a dick :33
 Chapel
Removed imperium something robes. Just... no.
 Crayons
Added the ability to draw graffiti and letters.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@1594 316c924e-a436-60f5-8080-3fe189b3f50e

code/game/objects/stacks/metal.dm

@@ -77,6 +77,8 @@ var/global/list/datum/stack_recipe/metal_recipes = list ( \
 	null, \
 	new/datum/stack_recipe("apc frame", /obj/item/apc_frame, 2), \
 	new/datum/stack_recipe("grenade casing", /obj/item/weapon/chem_grenade), \
+	null, \
+	new/datum/stack_recipe("iron door", /obj/mineral_door/iron, 20), \
 	)
 
 /obj/item/stack/sheet/metal

code/game/objects/stacks/minerals.dm

@@ -0,0 +1,71 @@
+/*
+CONTAINS:
+SANDSTONE
+DIAMOND
+URANIUM
+PLASMA
+GOLD
+SILVER
+*/
+
+//Sandstone
+var/global/list/datum/stack_recipe/sandstone_recipes = list ( \
+	new/datum/stack_recipe("sandstone door", /obj/mineral_door/sandstone, 20), \
+/*	new/datum/stack_recipe("sandstone wall", ???), \
+		new/datum/stack_recipe("sandstone floor", ???),\*/
+	)
+
+/obj/item/stack/sheet/sandstone
+	New(var/loc, var/amount=null)
+		recipes = sandstone_recipes
+		return ..()
+
+//Diamond
+var/global/list/datum/stack_recipe/diamond_recipes = list ( \
+	new/datum/stack_recipe("diamond door", /obj/mineral_door/transparent/diamond, 20), \
+	)
+
+/obj/item/stack/sheet/diamond
+	New(var/loc, var/amount=null)
+		recipes = diamond_recipes
+		return ..()
+
+//Uranium
+var/global/list/datum/stack_recipe/uranium_recipes = list ( \
+	new/datum/stack_recipe("uranium door", /obj/mineral_door/uranium, 20), \
+	)
+
+/obj/item/stack/sheet/uranium
+	New(var/loc, var/amount=null)
+		recipes = uranium_recipes
+		return ..()
+
+//Plasma
+var/global/list/datum/stack_recipe/plasma_recipes = list ( \
+	new/datum/stack_recipe("plasma door", /obj/mineral_door/transparent/plasma, 20), \
+	)
+
+/obj/item/stack/sheet/plasma
+	New(var/loc, var/amount=null)
+		recipes = plasma_recipes
+		return ..()
+
+//Gold
+var/global/list/datum/stack_recipe/gold_recipes = list ( \
+	new/datum/stack_recipe("golden door", /obj/mineral_door/gold, 20), \
+	)
+
+/obj/item/stack/sheet/gold
+	New(var/loc, var/amount=null)
+		recipes = gold_recipes
+		return ..()
+
+//Silver
+var/global/list/datum/stack_recipe/silver_recipes = list ( \
+	new/datum/stack_recipe("silver door", /obj/mineral_door/silver, 20), \
+	)
+
+/obj/item/stack/sheet/silver
+	New(var/loc, var/amount=null)
+		recipes = silver_recipes
+		return ..()