Various mining additions, fixes and rebalances.

code/modules/mining/ores_coins.dm

@@ -10,7 +10,7 @@
 /obj/item/weapon/ore/attackby(obj/item/I, mob/user, params)
 	if(istype(I, /obj/item/weapon/weldingtool))
 		var/obj/item/weapon/weldingtool/W = I
-		if(W.remove_fuel(15))
+		if(W.remove_fuel(15) && refined_type)
 			new refined_type(get_turf(src.loc))
 			qdel(src)
 		else if(W.isOn())
@@ -21,7 +21,7 @@
 	name = "uranium ore"
 	icon_state = "Uranium ore"
 	origin_tech = "materials=5"
-	points = 18
+	points = 30
 	materials = list(MAT_URANIUM=MINERAL_MATERIAL_AMOUNT)
 	refined_type = /obj/item/stack/sheet/mineral/uranium
 
@@ -64,7 +64,7 @@
 	name = "plasma ore"
 	icon_state = "Plasma ore"
 	origin_tech = "plasmatech=2;materials=2"
-	points = 36
+	points = 10
 	materials = list(MAT_PLASMA=MINERAL_MATERIAL_AMOUNT)
 	refined_type = /obj/item/stack/sheet/mineral/plasma
 
@@ -81,7 +81,7 @@
 	name = "silver ore"
 	icon_state = "Silver ore"
 	origin_tech = "materials=3"
-	points = 18
+	points = 15
 	materials = list(MAT_SILVER=MINERAL_MATERIAL_AMOUNT)
 	refined_type = /obj/item/stack/sheet/mineral/silver
 
@@ -89,7 +89,7 @@
 	name = "gold ore"
 	icon_state = "Gold ore"
 	origin_tech = "materials=4"
-	points = 18
+	points = 15
 	materials = list(MAT_GOLD=MINERAL_MATERIAL_AMOUNT)
 	refined_type = /obj/item/stack/sheet/mineral/gold
 
@@ -97,7 +97,7 @@
 	name = "diamond ore"
 	icon_state = "Diamond ore"
 	origin_tech = "materials=6"
-	points = 36
+	points = 50
 	materials = list(MAT_DIAMOND=MINERAL_MATERIAL_AMOUNT)
 	refined_type = /obj/item/stack/sheet/mineral/diamond
 
@@ -105,7 +105,7 @@
 	name = "bananium ore"
 	icon_state = "Clown ore"
 	origin_tech = "materials=4"
-	points = 27
+	points = 60
 	materials = list(MAT_BANANIUM=MINERAL_MATERIAL_AMOUNT)
 	refined_type = /obj/item/stack/sheet/mineral/bananium