diff --git a/mapgen.lua b/mapgen.lua
index 8426374..ff7d039 100644
--- a/mapgen.lua
+++ b/mapgen.lua
@@ -151,6 +151,7 @@ local room_size = 20
 local control_off = math_floor(room_size / 4)
 local biome_look = {}
 local cave_look = {}
+local ore_look = {}
 local tree_space = 3
 
 loud_walking.fcsize = table.copy(fcsize)
@@ -237,10 +238,27 @@ local function get_biome(x, y, z)
 				cave_lining = cave_stones[math.random(#cave_stones)]
 			end
 			cave_look[hash] = cave_lining
+
+			local sr = math.random(100)
+			if sr == 1 then
+				ore_look[hash] = 'default:stone_with_mese'
+			elseif sr <= 3 then
+				ore_look[hash] = 'default:stone_with_diamond'
+			elseif sr <= 7 then
+				ore_look[hash] = 'default:stone_with_gold'
+			elseif sr <= 15 then
+				ore_look[hash] = 'default:stone_with_copper'
+			elseif sr <= 31 then
+				ore_look[hash] = 'default:stone_with_iron'
+			elseif sr <= 63 then
+				ore_look[hash] = 'default:stone_with_coal'
+			else
+				ore_look[hash] = 'default:stone'
+			end
 		end
 
 		--return 'rainforest', cave_look[hash]
-		return biome_look[hash], cave_look[hash]
+		return biome_look[hash], cave_look[hash], ore_look[hash]
 	end
 end
 
@@ -301,7 +319,7 @@ local function generate(p_minp, p_maxp, seed)
 	local index = 0
 	local index3d = 0
 	local last_biome, last_px, last_py, last_pz, node_top, node_filler, node_water_top, node_water, depth_top, depth_water_top, depth_filler, node_stone, ocean, swamp, beach, dunes, height
-	local biome, cave_lining, room_type, room_type_below
+	local biome, cave_lining, room_type, room_type_below, ore_type
 
 	for z = minp.z, maxp.z do
 		local dz = z - minp.z
@@ -335,7 +353,7 @@ local function generate(p_minp, p_maxp, seed)
 				end
 
 				if py ~= last_py or px ~= last_px or pz ~= last_pz then
-					biome, cave_lining = get_biome(x, y, z)
+					biome, cave_lining, ore_type = get_biome(x, y, z)
 				end
 				if biome ~= last_biome then
 					node_top = biomes[biome].node_top or "default:dirt_with_grass"
@@ -505,6 +523,10 @@ local function generate(p_minp, p_maxp, seed)
 					in_cave = false
 				else
 					data[ivm] = node[node_stone]
+					if math.random(100) == 1 then
+						data[ivm] = node[ore_type]
+					end
+
 					if in_cave and node_stone == "default:stone" and math.random(20) == 1 then
 						data[ivm] = node["loud_walking:glowing_fungal_stone"]
 					elseif in_cave and not (ocean or swamp or beach) and node_stone == "default:stone" and not cave_lining and math.random(10) == 1 then