diff --git a/data/tconstruct/worldgen/placed_feature/cobalt_ore_large.json b/data/tconstruct/worldgen/placed_feature/cobalt_ore_large.json
new file mode 100644
index 0000000..d088828
--- /dev/null
+++ b/data/tconstruct/worldgen/placed_feature/cobalt_ore_large.json
@@ -0,0 +1,27 @@
+{
+  "feature": "tconstruct:cobalt_ore_large",
+  "placement": [
+    {
+      "type": "minecraft:count",
+      "count": 3
+    },
+    {
+      "type": "minecraft:in_square"
+    },
+    {
+      "type": "minecraft:height_range",
+      "height": {
+        "type": "minecraft:trapezoid",
+        "max_inclusive": {
+          "absolute": 31
+        },
+        "min_inclusive": {
+          "absolute": 8
+        }
+      }
+    },
+    {
+      "type": "minecraft:biome"
+    }
+  ]
+}
diff --git a/data/tconstruct/worldgen/placed_feature/cobalt_ore_small.json b/data/tconstruct/worldgen/placed_feature/cobalt_ore_small.json
new file mode 100644
index 0000000..1bc3d02
--- /dev/null
+++ b/data/tconstruct/worldgen/placed_feature/cobalt_ore_small.json
@@ -0,0 +1,27 @@
+{
+  "feature": "tconstruct:cobalt_ore_small",
+  "placement": [
+    {
+      "type": "minecraft:count",
+      "count": 1
+    },
+    {
+      "type": "minecraft:in_square"
+    },
+    {
+      "type": "minecraft:height_range",
+      "height": {
+        "type": "minecraft:uniform",
+        "max_inclusive": {
+          "absolute": 31
+        },
+        "min_inclusive": {
+          "above_bottom": 8
+        }
+      }
+    },
+    {
+      "type": "minecraft:biome"
+    }
+  ]
+}