{
  "stone_resources": {
    "stone_quarry": {
      "display_name": "Stone Quarry",
      "description": "Generic rock outcrop suitable for basic construction materials",
      "formation_type": "surface_rock_exposure",
      "extraction_difficulty": "medium",
      "budget_impact": 2,
      "resource_yield": "very_high",
      "quality": "standard"
    },
    "granite_quarry": {
      "display_name": "Granite Quarry",
      "description": "High-quality igneous rock perfect for construction and monuments",
      "formation_type": "plutonic_igneous_intrusion",
      "extraction_difficulty": "hard",
      "budget_impact": 4,
      "resource_yield": "very_high",
      "quality": "premium"
    },
    "limestone_quarry": {
      "display_name": "Limestone Quarry",
      "description": "Sedimentary rock ideal for cement production and building materials",
      "formation_type": "marine_carbonate_precipitation",
      "extraction_difficulty": "medium",
      "budget_impact": 3,
      "resource_yield": "very_high",
      "quality": "standard"
    },
    "sandstone_quarry": {
      "display_name": "Sandstone Quarry",
      "description": "Layered sedimentary rock suitable for construction blocks and aggregate",
      "formation_type": "clastic_sedimentary_formation",
      "extraction_difficulty": "easy",
      "budget_impact": 2,
      "resource_yield": "very_high",
      "quality": "standard"
    },
    "marble_deposit": {
      "display_name": "Marble Deposit",
      "description": "Metamorphic limestone with excellent carving properties and durability",
      "formation_type": "limestone_metamorphism",
      "extraction_difficulty": "hard",
      "budget_impact": 4,
      "resource_yield": "high",
      "quality": "premium"
    },
    "clay_pit": {
      "display_name": "Clay Pit",
      "description": "Fine sedimentary material essential for ceramics and construction",
      "formation_type": "weathering_accumulation",
      "extraction_difficulty": "very_easy",
      "budget_impact": 1,
      "resource_yield": "very_high",
      "quality": "standard"
    },
    "sand_deposit": {
      "display_name": "Sand Deposit",
      "description": "Fine granular material perfect for concrete and glass production",
      "formation_type": "weathering_erosion_accumulation",
      "extraction_difficulty": "very_easy",
      "budget_impact": 1,
      "resource_yield": "very_high",
      "quality": "standard"
    },
    "gravel_pit": {
      "display_name": "Gravel Pit",
      "description": "Mixed rock fragments perfect for concrete aggregate and road base",
      "formation_type": "fluvial_glacial_accumulation",
      "extraction_difficulty": "very_easy",
      "budget_impact": 1,
      "resource_yield": "very_high",
      "quality": "standard"
    },
    "slate_deposit": {
      "display_name": "Slate Deposit",
      "description": "Fine-grained metamorphic rock perfect for roofing and flooring",
      "formation_type": "shale_metamorphism",
      "extraction_difficulty": "medium",
      "budget_impact": 3,
      "resource_yield": "high",
      "quality": "premium"
    },
    "quartzite_deposit": {
      "display_name": "Quartzite Deposit",
      "description": "Hard metamorphic quartz rock with excellent abrasive properties",
      "formation_type": "sandstone_metamorphism",
      "extraction_difficulty": "hard",
      "budget_impact": 3,
      "resource_yield": "high",
      "quality": "premium"
    },
    "gneiss_outcrop": {
      "display_name": "Gneiss Outcrop",
      "description": "Banded metamorphic rock suitable for decorative construction",
      "formation_type": "high_grade_metamorphism",
      "extraction_difficulty": "hard",
      "budget_impact": 3,
      "resource_yield": "high",
      "quality": "standard"
    }
  }
}