Stool and table tweaks, adjusted tables on the map.

code/modules/materials/materials.dm

@@ -159,7 +159,7 @@ var/list/name_to_material
 	stack_origin_tech = "phorontech=2;materials=2"
 	door_icon_base = "stone"
 
-/material/sandstone
+/material/stone
 	name = "sandstone"
 	stack_type = /obj/item/stack/material/sandstone
 	icon_base = "stone"
@@ -170,6 +170,13 @@ var/list/name_to_material
 	hardness = 55
 	door_icon_base = "stone"
 
+/material/stone/marble
+	name = "marble"
+	icon_colour = "#AAAAAA"
+	weight = 26
+	hardness = 100
+	integrity = 201 //hack to stop kitchen benches being flippable, todo: refactor into weight system
+
 /material/steel
 	name = DEFAULT_WALL_MATERIAL
 	stack_type = /obj/item/stack/material/steel

code/modules/tables/presets.dm

@@ -7,6 +7,20 @@
 			material = get_material_by_name(DEFAULT_WALL_MATERIAL)
 			..()
 
+	plastic
+		icon_state = "plain_preview"
+		color = "#EEEEEE"
+		New()
+			material = get_material_by_name("plastic")
+			..()
+
+	marble
+		icon_state = "stone_preview"
+		color = "#CCCCCC"
+		New()
+			material = get_material_by_name("marble")
+			..()
+
 	reinforced
 		icon_state = "reinf_preview"
 		color = "#666666"