diff --git a/overrides/config/gregtech/worldgen/vein/overworld/pitchblende_vein.json b/overrides/config/gregtech/worldgen/vein/overworld/pitchblende_vein.json
new file mode 100644
index 0000000..7f96bf6
--- /dev/null
+++ b/overrides/config/gregtech/worldgen/vein/overworld/pitchblende_vein.json
@@ -0,0 +1,34 @@
+{
+  "weight": 20,
+  "density": 0.18,
+  "min_height": 30,
+  "max_height": 60,
+  "vein_populator": {
+    "type": "surface_rock",
+    "material": "uraninite"
+  },
+  "generator": {
+    "type": "layered",
+    "radius": [
+      14,
+      16
+    ]
+  },
+  "filler": {
+    "type": "layered",
+    "values": [
+      {
+        "primary": "ore:pitchblende"
+      },
+      {
+        "secondary": "ore:pitchblende"
+      },
+      {
+        "between": "ore:uraninite"
+      },
+      {
+        "sporadic": "ore:uraninite"
+      }
+    ]
+  }
+}
diff --git a/overrides/config/gregtech/worldgen/vein/overworld/tetrahedrite_vein.json b/overrides/config/gregtech/worldgen/vein/overworld/tetrahedrite_vein.json
new file mode 100644
index 0000000..781c89e
--- /dev/null
+++ b/overrides/config/gregtech/worldgen/vein/overworld/tetrahedrite_vein.json
@@ -0,0 +1,34 @@
+{
+  "weight": 30,
+  "density": 0.15,
+  "min_height": 80,
+  "max_height": 120,
+  "vein_populator": {
+    "type": "surface_rock",
+    "material": "tetrahedrite"
+  },
+  "generator": {
+    "type": "layered",
+    "radius": [
+      17,
+      24
+    ]
+  },
+  "filler": {
+    "type": "layered",
+    "values": [
+      {
+        "primary": "ore:tetrahedrite"
+      },
+      {
+        "secondary": "ore:tetrahedrite"
+      },
+      {
+        "between": "ore:copper"
+      },
+      {
+        "sporadic": "ore:stibnite"
+      }
+    ]
+  }
+}