[
  {
    "name": "Air",
    "albedo": [1, 1, 1],
    "metalness": 0,
    "specular": 0,
    "ior": 1.000273,
    "density": 1.2,
    "densityRange": [1.146, 1.423],
    "category": ["Gas"],
    "description": "Measured at standard temperature and pressure (STP).",
    "sources": [
      "https://en.wikipedia.org/wiki/List_of_refractive_indices",
      "https://refractiveindex.info/?shelf=other&book=air&page=Ciddor",
      "https://en.wikipedia.org/wiki/Density"
    ],
    "tags": [""]
  },
  {
    "name": "Aluminum",
    "albedo": [0.913, 0.921, 0.925],
    "metalness": 1,
    "specular": 0.5,
    "ior": 1.5,
    "density": 2700,
    "category": ["Metals"],
    "description": "",
    "sources": [
      "https://docs.unrealengine.com/4.27/en-US/RenderingAndGraphics/Materials/PhysicallyBased/",
      "https://en.wikipedia.org/wiki/Density"
    ],
    "tags": ["aluminium"]
  },
  {
    "name": "Blood",
    "albedo": [0.64448, 0.003, 0.005],
    "metalness": 0,
    "specular": 0.214,
    "ior": 1.301,
    "density": 1060,
    "category": ["Human"],
    "description": "The color of blood depends on how much oxygen is in the blood. When there is plenty of oxygen, the blood is more reddish in color. The reason that this is so is because of a protein called hemoglobin, which carries the oxygen in your blood. When hemoglobin has a full oxygen load, it gives the blood a reddish color.",
    "sources": [
      "http://scienceline.ucsb.edu/getkey.php?key=2927",
      "https://en.wikipedia.org/wiki/Blood",
      "https://refractiveindex.info/?shelf=other&book=blood&page=Rowe",
      "https://hypertextbook.com/facts/2004/MichaelShmukler.shtml",
      "https://www.researchgate.net/figure/Color-chart-for-the-measurement-of-methemoglobin-The-color-chart-was-prepared-according_fig2_26884296"
    ],
    "tags": [""]
  },
  {
    "name": "Bone",
    "albedo": [1, 1, 0.871367],
    "metalness": 0,
    "specular": 0.5,
    "ior": 1.5,
    "density": 1900,
    "densityRange": [1000, 2000],
    "category": ["Organic"],
    "description": "",
    "sources": [
      "https://hypertextbook.com/facts/2002/AnnaYarusskaya.shtml",
      "https://www.tandfonline.com/doi/pdf/10.3109/02841867809127938",
      "https://en.wikipedia.org/wiki/Ivory_(color)"
    ],
    "tags": ["skeleton"]
  },
  {
    "name": "Charcoal",
    "albedo": [0.04, 0.04, 0.04],
    "metalness": 0,
    "specular": 0.5,
    "ior": 1.5,
    "density": 300,
    "densityRange": [200, 500],
    "category": ["Organic"],
    "description": "",
    "sources": [
      "https://seblagarde.wordpress.com/2011/08/17/feeding-a-physical-based-lighting-mode/",
      "http://ukrfuel.com/news-physical-properties-of-charcoal-22.html",
      "https://en.wikipedia.org/wiki/Activated_carbon"
    ],
    "tags": [""]
  },
  {
    "name": "Chocolate",
    "albedo": [0.198, 0.05, 0.0],
    "metalness": 0,
    "specular": 0.5,
    "ior": 1.5,
    "density": 1300,
    "densityRange": [1229, 1336],
    "category": ["Organic"],
    "description": "",
    "sources": [
      "https://en.wikipedia.org/wiki/Chocolate_(color)",
      "https://www.density.co.uk/documents/Density-of-Chocolate.pdf"
    ],
    "tags": [""]
  },
  {
    "name": "Chromium",
    "albedo": [0.55, 0.556, 0.554],
    "metalness": 1,
    "specular": 0.5,
    "ior": 1.5,
    "density": 7200,
    "category": ["Metals"],
    "description": "",
    "sources": [
      "https://docs.unrealengine.com/4.27/en-US/RenderingAndGraphics/Materials/PhysicallyBased/",
      "https://www.chaos.com/blog/understanding-metalness",
      "https://en.wikipedia.org/wiki/Density"
    ],
    "tags": ["chrome"]
  },
  {
    "name": "Cobalt",
    "albedo": [0.662, 0.655, 0.634],
    "metalness": 1,
    "specular": 0.5,
    "ior": 1.5,
    "density": 8900,
    "category": ["Metals"],
    "description": "",
    "sources": [
      "https://docs.unrealengine.com/4.27/en-US/RenderingAndGraphics/Materials/PhysicallyBased/",
      "https://en.wikipedia.org/wiki/Density"
    ],
    "tags": [""]
  },
  {
    "name": "Concrete",
    "albedo": [0.51, 0.51, 0.51],
    "metalness": 0,
    "specular": 0.5,
    "ior": 1.5,
    "density": 2400,
    "category": ["Organic"],
    "description": "",
    "sources": [
      "https://docs.unrealengine.com/4.27/en-US/RenderingAndGraphics/Materials/PhysicallyBased/",
      "https://en.wikipedia.org/wiki/Density"
    ],
    "tags": [""]
  },
  {
    "name": "Cooking Oil",
    "albedo": [0.737911, 0.687, 0.091],
    "metalness": 0,
    "specular": 0.453,
    "ior": 1.47,
    "density": 920,
    "category": ["Liquids"],
    "description": "",
    "sources": [
      "https://hypertextbook.com/facts/2006/TingTingLuo.shtml",
      "https://en.wikipedia.org/wiki/List_of_refractive_indices",
      "https://www.color-name.com/olive-oil.color",
      "https://en.wikipedia.org/wiki/Density"
    ],
    "tags": [""]
  },
  {
    "name": "Copper",
    "albedo": [0.955, 0.637, 0.538],
    "metalness": 1,
    "specular": 0.5,
    "ior": 1.5,
    "density": 8940,
    "category": ["Metals"],
    "description": "",
    "sources": [
      "https://docs.unrealengine.com/4.27/en-US/RenderingAndGraphics/Materials/PhysicallyBased/",
      "https://en.wikipedia.org/wiki/Density"
    ],
    "tags": [""]
  },
  {
    "name": "Cornea",
    "albedo": [1, 1, 1],
    "metalness": 0,
    "specular": 0.313,
    "ior": 1.376,
    "density": 0,
    "category": ["Human"],
    "description": "",
    "sources": [
      "https://en.wikipedia.org/wiki/Cornea",
      "https://www.sciencedirect.com/science/article/abs/pii/S1367048418310452"
    ],
    "tags": ["eye"]
  },
  {
    "name": "Diamond",
    "albedo": [1, 1, 1],
    "metalness": 0,
    "specular": 0.5,
    "ior": 2.4168,
    "density": 3500,
    "category": ["Crystals"],
    "description": "",
    "sources": [
      "https://refractiveindex.info/?shelf=3d&book=crystals&page=diamond",
      "https://www.gemsociety.org/article/table-refractive-index-double-refraction-gems/",
      "https://en.wikipedia.org/wiki/Density"
    ],
    "tags": ["gem", "gemstone"]
  },
  {
    "name": "Glass",
    "albedo": [1, 1, 1],
    "metalness": 0,
    "specular": 0.5,
    "ior": 1.52,
    "density": 2500,
    "category": ["Crystals"],
    "description": "",
    "sources": [
      "https://en.wikipedia.org/wiki/Soda%E2%80%93lime_glass",
      "https://en.wikipedia.org/wiki/Density"
    ],
    "tags": [""]
  },
  {
    "name": "Gold",
    "albedo": [1.0, 0.766, 0.336],
    "metalness": 1,
    "specular": 0.5,
    "ior": 1.5,
    "density": 19320,
    "category": ["Metals"],
    "description": "",
    "sources": [
      "https://docs.unrealengine.com/4.27/en-US/RenderingAndGraphics/Materials/PhysicallyBased/",
      "https://en.wikipedia.org/wiki/Density"
    ],
    "tags": [""]
  },
  {
    "name": "Gray Card (18%)",
    "albedo": [0.18, 0.18, 0.18],
    "metalness": 0,
    "specular": 0.5,
    "ior": 1.5,
    "density": 0,
    "category": ["Calibration"],
    "description": "",
    "sources": ["https://en.wikipedia.org/wiki/Middle_gray"],
    "tags": [""]
  },
  {
    "name": "Honey",
    "albedo": [0.83077, 0.397, 0.038],
    "metalness": 0,
    "specular": 0.5,
    "ior": 1.504,
    "density": 1400,
    "densityRange": [1380, 1450],
    "category": ["Liquids"],
    "description": "Variations in its water content alter its refractive index. Typically, the refractive index for honey ranges from 1.504 at 13% water content to 1.474 at 25%.",
    "sources": [
      "https://www.color-name.com/honey.color",
      "https://en.wikipedia.org/wiki/Honey",
      "https://carolinahoneybees.com/the-color-of-honey/",
      "https://books.google.se/books?id=6RfVqdqxCiUC&pg=PA74&redir_esc=y#v=onepage&q&f=false",
      "https://wiki.anton-paar.com/en/flower-honey-blended/"
    ],
    "tags": [""]
  },
  {
    "name": "Iron",
    "albedo": [0.56, 0.57, 0.58],
    "metalness": 1,
    "specular": 0.5,
    "ior": 1.5,
    "density": 7870,
    "category": ["Metals"],
    "description": "",
    "sources": [
      "https://docs.unrealengine.com/4.27/en-US/RenderingAndGraphics/Materials/PhysicallyBased/",
      "https://en.wikipedia.org/wiki/Density"
    ],
    "tags": [""]
  },
  {
    "name": "Lead",
    "albedo": [0.6549, 0.65882, 0.6902],
    "metalness": 1,
    "specular": 0.5,
    "ior": 1.5,
    "density": 11340,
    "category": ["Metals"],
    "description": "",
    "sources": [
      "https://www.chaosgroup.com/blog/understanding-metalness",
      "https://en.wikipedia.org/wiki/Density"
    ],
    "tags": [""]
  },
  {
    "name": "Mercury",
    "albedo": [0.78039, 0.77647, 0.77647],
    "metalness": 1,
    "specular": 0.5,
    "ior": 1.5,
    "density": 13546,
    "category": ["Metals"],
    "description": "",
    "sources": [
      "https://www.chaosgroup.com/blog/understanding-metalness",
      "https://en.wikipedia.org/wiki/Density"
    ],
    "tags": [""]
  },
  {
    "name": "Milk",
    "albedo": [0.603827, 0.584, 0.497],
    "metalness": 0,
    "specular": 0.277,
    "ior": 1.348,
    "density": 1030,
    "densityRange": [1026, 1035],
    "category": ["Liquids"],
    "description": "Cow's milk",
    "sources": [
      "https://www.researchgate.net/publication/346758555_What_Is_the_Color_of_Milk_and_Dairy_Products_and_How_Is_It_Measured",
      "http://dairy-technology.blogspot.com/2014/11/refractive-index.html",
      "https://www.theengineer.co.uk/supplier-network/product/density-measurement-of-milk-and-dairy-products/",
      "https://hypertextbook.com/facts/2002/AliciaNoelleJones.shtml"
    ],
    "tags": [""]
  },
  {
    "name": "Nickel",
    "albedo": [0.66, 0.609, 0.526],
    "metalness": 1,
    "specular": 0.5,
    "ior": 1.5,
    "density": 8900,
    "category": ["Metals"],
    "description": "",
    "sources": [
      "https://docs.unrealengine.com/4.27/en-US/RenderingAndGraphics/Materials/PhysicallyBased/",
      "https://en.wikipedia.org/wiki/Density"
    ],
    "tags": [""]
  },
  {
    "name": "Polycarbonate (PC)",
    "albedo": [1, 1, 1],
    "metalness": 0,
    "specular": 0.5,
    "ior": 1.5848,
    "density": 1200,
    "category": ["Plastics"],
    "description": "",
    "sources": [
      "https://en.wikipedia.org/wiki/Polycarbonate",
      "https://refractiveindex.info/?shelf=3d&book=plastics&page=pc",
      "https://www.bpf.co.uk/plastipedia/polymers/polycarbonate.aspx"
    ],
    "tags": ["plastic"]
  },
  {
    "name": "Polyethylene Terephthalate (PET)",
    "albedo": [1, 1, 1],
    "metalness": 0,
    "specular": 0.5,
    "ior": 1.575,
    "density": 1380,
    "category": ["Plastics"],
    "description": "",
    "sources": [
      "https://en.wikipedia.org/wiki/Polyethylene_terephthalate",
      "https://polymerdatabase.com/polymer%20physics/Ref%20Index%20Table2%20.html"
    ],
    "tags": ["plastic", "PET"]
  },
  {
    "name": "Polypropylene (PP)",
    "albedo": [1, 1, 1],
    "metalness": 0,
    "specular": 0.5,
    "ior": 1.492,
    "density": 900,
    "category": ["Plastics"],
    "description": "",
    "sources": [
      "https://en.wikipedia.org/wiki/Polypropylene",
      "https://refractiveindex.info/?shelf=3d&book=plastics&page=pc",
      "https://www.osapublishing.org/ao/viewmedia.cfm?uri=ao-42-3-592"
    ],
    "tags": ["plastic"]
  },
  {
    "name": "Polyvinyl Chloride (PVC)",
    "albedo": [1, 1, 1],
    "metalness": 0,
    "specular": 0.5,
    "ior": 1.531,
    "density": 1300,
    "densityRange": [1100, 1450],
    "category": ["Plastics"],
    "description": "",
    "sources": [
      "https://en.wikipedia.org/wiki/Polyvinyl_chloride",
      "https://polymerdatabase.com/polymer%20physics/Ref%20Index%20Table2%20.html"
    ],
    "tags": ["plastic", "PVC"]
  },
  {
    "name": "Platinum",
    "albedo": [0.672, 0.637, 0.585],
    "metalness": 1,
    "specular": 0.5,
    "ior": 1.5,
    "density": 21450,
    "category": ["Metals"],
    "description": "",
    "sources": [
      "https://docs.unrealengine.com/4.27/en-US/RenderingAndGraphics/Materials/PhysicallyBased/",
      "https://en.wikipedia.org/wiki/Density"
    ],
    "tags": [""]
  },
  {
    "name": "Salt",
    "albedo": [0.8, 0.8, 0.8],
    "metalness": 0,
    "specular": 0.544,
    "ior": 1.5275,
    "density": 2170,
    "category": ["Crystals"],
    "description": "",
    "sources": [
      "https://refractiveindex.info/?shelf=3d&book=crystals&page=salt",
      "https://en.wikipedia.org/wiki/Sodium_chloride"
    ],
    "tags": []
  },
  {
    "name": "Silver",
    "albedo": [0.972, 0.96, 0.915],
    "metalness": 1,
    "specular": 0.5,
    "ior": 1.5,
    "density": 10500,
    "category": ["Metals"],
    "description": "",
    "sources": [
      "https://docs.unrealengine.com/4.27/en-US/RenderingAndGraphics/Materials/PhysicallyBased/",
      "https://en.wikipedia.org/wiki/Density"
    ],
    "tags": [""]
  },
  {
    "name": "Snow",
    "albedo": [0.81, 0.81, 0.81],
    "metalness": 0,
    "specular": 0.224,
    "ior": 1.3098,
    "density": 917,
    "category": ["Crystals"],
    "description": "",
    "sources": [
      "https://docs.unrealengine.com/4.27/en-US/RenderingAndGraphics/Materials/PhysicallyBased/",
      "https://seblagarde.wordpress.com/2011/08/17/feeding-a-physical-based-lighting-mode/",
      "https://refractiveindex.info/?shelf=3d&book=crystals&page=ice",
      "https://en.wikipedia.org/wiki/Density"
    ],
    "tags": ["ice"]
  },
  {
    "name": "Titanium",
    "albedo": [0.542, 0.497, 0.449],
    "metalness": 1,
    "specular": 0.5,
    "ior": 1.5,
    "density": 4540,
    "category": ["Metals"],
    "description": "",
    "sources": [
      "https://docs.unrealengine.com/4.27/en-US/RenderingAndGraphics/Materials/PhysicallyBased/",
      "https://en.wikipedia.org/wiki/Density"
    ],
    "tags": [""]
  },
  {
    "name": "Tungsten",
    "albedo": [0.92549, 0.83529, 0.75686],
    "metalness": 1,
    "specular": 0.5,
    "ior": 1.5,
    "density": 19300,
    "category": ["Metals"],
    "description": "",
    "sources": [
      "https://www.chaosgroup.com/blog/understanding-metalness",
      "https://en.wikipedia.org/wiki/Density"
    ],
    "tags": [""]
  },
  {
    "name": "Vacuum",
    "albedo": [0, 0, 0],
    "metalness": 0,
    "specular": 0,
    "ior": 1.0,
    "density": 0,
    "category": ["Organic"],
    "description": "",
    "sources": [
      "https://en.wikipedia.org/wiki/List_of_refractive_indices",
      "https://math.ucr.edu/home/baez/vacuum.html"
    ],
    "tags": [""]
  },
  {
    "name": "Vanadium",
    "albedo": [0.9451, 0.89412, 0.78039],
    "metalness": 1,
    "specular": 0.5,
    "ior": 1.5,
    "density": 6100,
    "category": ["Metals"],
    "description": "",
    "sources": [
      "https://www.chaosgroup.com/blog/understanding-metalness",
      "https://en.wikipedia.org/wiki/Density"
    ],
    "tags": [""]
  },
  {
    "name": "Water",
    "albedo": [1, 1, 1],
    "metalness": 0,
    "specular": 0.255,
    "ior": 1.3325,
    "density": 1000,
    "densityRange": [958, 1000],
    "category": ["Liquids"],
    "description": "Liquid water (H2O) at 25 °C",
    "sources": [
      "https://docs.unrealengine.com/4.27/en-US/RenderingAndGraphics/Materials/PhysicallyBased/",
      "https://refractiveindex.info/?shelf=3d&book=liquids&page=water",
      "https://en.wikipedia.org/wiki/Density",
      "https://en.wikipedia.org/wiki/Properties_of_water#Density_of_water_and_ice"
    ],
    "tags": [""]
  },
  {
    "name": "Zinc",
    "albedo": [0.87451, 0.86667, 0.8549],
    "metalness": 1,
    "specular": 0.5,
    "ior": 1.5,
    "density": 7000,
    "category": ["Metals"],
    "description": "",
    "sources": [
      "https://www.chaosgroup.com/blog/understanding-metalness",
      "https://en.wikipedia.org/wiki/Density"
    ],
    "tags": [""]
  }
]