modded7/overrides/config/gregtech/worldgen/vein/moon/diamond_vein.json

{
  "weight": 0,
  "density": 0.6,
  "max_height": 40,
  "min_height": 5,
      "biome_modifier": {
		"type": "biome_map",
		"advancedrocketry:moon": 600,
		"advancedrocketry:moondark": 600
   },
  "generator": {
    "type": "ellipsoid",
    "radius": [14, 13]
  },
  "filler": {
    "type": "simple",
    "value": {
      "type": "weight_random",
      "values": [
        {
          "weight": 60,
          "value": "ore:diamond"
        },
		{
          "weight": 40,
          "value": "ore:graphite"
        }
      ]
    }
  }
}