diff --git a/deploy/materials.json b/deploy/materials.json
index 46856c7..211243a 100644
--- a/deploy/materials.json
+++ b/deploy/materials.json
@@ -1,12 +1,12 @@
 [
   {
     "name": "Aluminum",
-    "color": [0.912, 0.914, 0.92],
+    "color": [0.933, 0.912, 0.853],
     "metalness": 1,
-    "specularColor": [0.97, 0.979, 0.988],
+    "specularColor": [0.981, 0.979, 0.961],
     "roughness": 0,
     "ior": 1.5,
-    "complexIor": [1.3456, 7.4746, 0.96521, 6.3995, 0.61722, 5.3031],
+    "complexIor": [1.16234, 7.90265, 0.958053, 6.29309, 1.04947, 5.01364],
     "density": 2700,
     "category": ["Metal"],
     "description": "",
@@ -105,12 +105,12 @@
   },
   {
     "name": "Brass",
-    "color": [0.887, 0.789, 0.434],
+    "color": [0.931, 0.776, 0.392],
     "metalness": 1,
-    "specularColor": [0.988, 0.976, 0.843],
+    "specularColor": [0.995, 0.974, 0.747],
     "roughness": 0,
     "ior": 1.5,
-    "complexIor": [0.444, 3.695, 0.527, 2.765, 1.094, 1.829],
+    "complexIor": [0.341048, 4.14088, 0.53349, 2.67993, 1.42749, 1.87543],
     "density": 8600,
     "category": ["Metal"],
     "description": "Brass is an alloy of copper and zinc, with a bright and gold-like appearance. It is similar to bronze, another alloy containing copper that uses tin instead of zinc. Historically, the distinction between the two alloys has been less consistent and clear, and modern practice in museums and archaeology increasingly avoids both terms for historical objects in favor of the more general \"copper alloy\".",
@@ -227,12 +227,12 @@
   },
   {
     "name": "Chromium",
-    "color": [0.638, 0.651, 0.663],
+    "color": [0.653, 0.65, 0.615],
     "metalness": 1,
-    "specularColor": [0.632, 0.718, 0.809],
+    "specularColor": [0.675, 0.72, 0.711],
     "roughness": 0,
     "ior": 1.5,
-    "complexIor": [3.4256, 4.273, 2.7891, 4.1976, 2.0246, 3.8586],
+    "complexIor": [3.20617, 4.38724, 2.76851, 4.18069, 2.56326, 3.75018],
     "density": 7200,
     "category": ["Metal"],
     "description": "",
@@ -247,12 +247,12 @@
   },
   {
     "name": "Cobalt",
-    "color": [0.692, 0.703, 0.673],
+    "color": [0.715, 0.702, 0.622],
     "metalness": 1,
-    "specularColor": [0.684, 0.771, 0.817],
+    "specularColor": [0.731, 0.775, 0.715],
     "roughness": 0,
     "ior": 1.5,
-    "complexIor": [3.5681, 5.0469, 2.7408, 4.7897, 2.0192, 3.9523],
+    "complexIor": [3.33754, 5.27723, 2.6841, 4.73548, 2.57555, 3.81892],
     "density": 8900,
     "category": ["Metal"],
     "description": "",
@@ -334,12 +334,12 @@
   },
   {
     "name": "Copper",
-    "color": [0.926, 0.721, 0.504],
+    "color": [0.988, 0.688, 0.448],
     "metalness": 1,
-    "specularColor": [0.996, 0.957, 0.823],
+    "specularColor": [0.999, 0.946, 0.705],
     "roughness": 0,
     "ior": 1.5,
-    "complexIor": [0.27105, 3.6092, 0.67693, 2.6248, 1.3164, 2.2921],
+    "complexIor": [0.137212, 5.48257, 0.750114, 2.56138, 1.75582, 2.26828],
     "density": 8940,
     "category": ["Metal"],
     "description": "",
@@ -497,12 +497,12 @@
   },
   {
     "name": "Gold",
-    "color": [0.944, 0.776, 0.373],
+    "color": [1.0, 0.72, 0.315],
     "metalness": 1,
-    "specularColor": [0.998, 0.981, 0.751],
+    "specularColor": [1.0, 0.973, 0.597],
     "roughness": 0,
     "ior": 1.5,
-    "complexIor": [0.18299, 3.4242, 0.42108, 2.3459, 1.3734, 1.7704],
+    "complexIor": [0, 6.3108, 0.487424, 2.18391, 1.74577, 1.63493],
     "density": 19320,
     "category": ["Metal"],
     "description": "",
@@ -582,12 +582,12 @@
   },
   {
     "name": "Iron",
-    "color": [0.531, 0.512, 0.496],
+    "color": [0.542, 0.512, 0.458],
     "metalness": 1,
-    "specularColor": [0.571, 0.54, 0.586],
+    "specularColor": [0.612, 0.541, 0.422],
     "roughness": 0,
     "ior": 1.5,
-    "complexIor": [2.9114, 3.0893, 2.9497, 2.9318, 2.5845, 2.767],
+    "complexIor": [2.73466, 3.14869, 2.94186, 2.92718, 3.15654, 2.46012],
     "density": 7870,
     "category": ["Metal"],
     "description": "",
@@ -627,12 +627,12 @@
   },
   {
     "name": "Lead",
-    "color": [0.632, 0.626, 0.641],
+    "color": [0.641, 0.622, 0.59],
     "metalness": 1,
-    "specularColor": [0.803, 0.808, 0.862],
+    "specularColor": [0.819, 0.804, 0.769],
     "roughness": 0,
     "ior": 1.5,
-    "complexIor": [1.91, 3.51, 1.83, 3.4, 1.44, 3.18],
+    "complexIor": [1.81659, 3.50606, 1.84441, 3.37971, 1.96022, 3.23189],
     "density": 11340,
     "category": ["Metal"],
     "description": "",
@@ -685,12 +685,12 @@
   },
   {
     "name": "Mercury",
-    "color": [0.781, 0.779, 0.779],
+    "color": [0.799, 0.777, 0.721],
     "metalness": 1,
-    "specularColor": [0.879, 0.91, 0.941],
+    "specularColor": [0.901, 0.91, 0.89],
     "roughness": 0,
     "ior": 1.5,
-    "complexIor": [2.0733, 5.3383, 1.5523, 4.651, 1.0606, 3.8628],
+    "complexIor": [1.86932, 5.36989, 1.53811, 4.60484, 1.4963, 3.92685],
     "density": 13546,
     "viscosity": 1.552,
     "category": ["Metal"],
@@ -769,12 +769,12 @@
   },
   {
     "name": "Nickel",
-    "color": [0.649, 0.61, 0.541],
+    "color": [0.664, 0.606, 0.495],
     "metalness": 1,
-    "specularColor": [0.797, 0.801, 0.789],
+    "specularColor": [0.824, 0.798, 0.68],
     "roughness": 0,
     "ior": 1.5,
-    "complexIor": [2.0592, 3.7574, 1.8179, 3.2741, 1.621, 2.6933],
+    "complexIor": [1.88896, 3.7543, 1.81884, 3.2447, 2.0708, 2.64853],
     "density": 8900,
     "category": ["Metal"],
     "description": "",
@@ -958,12 +958,12 @@
   },
   {
     "name": "Platinum",
-    "color": [0.679, 0.642, 0.588],
+    "color": [0.695, 0.638, 0.541],
     "metalness": 1,
-    "specularColor": [0.785, 0.789, 0.784],
+    "specularColor": [0.816, 0.786, 0.671],
     "roughness": 0,
     "ior": 1.5,
-    "complexIor": [2.3757, 4.2655, 2.0847, 3.7153, 1.8453, 3.1365],
+    "complexIor": [2.1755, 4.28265, 2.0879, 3.67782, 2.35677, 3.05144],
     "density": 21450,
     "category": ["Metal"],
     "description": "",
@@ -998,6 +998,27 @@
       "https://raw.githubusercontent.com/AntonPalmqvist/physically-based-api/main/images/renders/cycles/600/polyurethane.jpeg"
     ]
   },
+  {
+    "name": "Quartz",
+    "color": [1, 1, 1],
+    "metalness": 0,
+    "roughness": 0,
+    "ior": 1.54,
+    "transmission": 1,
+    "transmissionDispersion": 67.82,
+    "density": 2600,
+    "category": ["Crystal"],
+    "description": "",
+    "sources": [
+      "https://en.wikipedia.org/w/index.php?title=Quartz&oldid=1274064692",
+      "https://en.wikipedia.org/w/index.php?title=Density&oldid=1271894167",
+      "https://refractiveindex.info/?shelf=3d&book=crystals&page=quartz"
+    ],
+    "tags": [],
+    "reference": [
+      "https://raw.githubusercontent.com/AntonPalmqvist/physically-based-api/main/images/renders/cycles/600/quartz.jpeg"
+    ]
+  },
   {
     "name": "Salt",
     "color": [1, 1, 1],
@@ -1061,11 +1082,12 @@
   },
   {
     "name": "Silicon",
-    "color": [0.344, 0.367, 0.419],
+    "color": [0.351, 0.367, 0.394],
     "metalness": 1,
+    "specularColor": [0.081, 0, 0.004],
     "roughness": 0,
     "ior": 1.5,
-    "complexIor": [3.835, 0.014, 4.073, 0.028, 4.673, 0.095],
+    "complexIor": [3.63351, 0.966245, 4.06958, 0, 4.36103, 0],
     "density": 2330,
     "category": ["Metal"],
     "description": "",
@@ -1081,12 +1103,12 @@
   },
   {
     "name": "Silver",
-    "color": [0.962, 0.949, 0.922],
+    "color": [0.984, 0.946, 0.851],
     "metalness": 1,
-    "specularColor": [0.999, 0.998, 0.998],
+    "specularColor": [0.999, 0.998, 0.986],
     "roughness": 0,
     "ior": 1.5,
-    "complexIor": [0.15943, 3.9291, 0.14512, 3.19, 0.13547, 2.3808],
+    "complexIor": [0.0636949, 3.69295, 0.155409, 3.20559, 0.426839, 3.12206],
     "density": 10500,
     "category": ["Metal"],
     "description": "",
@@ -1334,12 +1356,12 @@
   },
   {
     "name": "Titanium",
-    "color": [0.616, 0.582, 0.544],
+    "color": [0.633, 0.578, 0.503],
     "metalness": 1,
-    "specularColor": [0.689, 0.683, 0.689],
+    "specularColor": [0.728, 0.68, 0.55],
     "roughness": 0,
     "ior": 1.5,
-    "complexIor": [2.7407, 3.8143, 2.5418, 3.4345, 2.267, 3.0385],
+    "complexIor": [2.55584, 3.89385, 2.52916, 3.39243, 2.8235, 2.85229],
     "density": 4540,
     "category": ["Metal"],
     "description": "",
@@ -1372,12 +1394,12 @@
   },
   {
     "name": "Tungsten",
-    "color": [0.504, 0.498, 0.478],
+    "color": [0.518, 0.495, 0.442],
     "metalness": 1,
-    "specularColor": [0.403, 0.418, 0.423],
+    "specularColor": [0.461, 0.413, 0.206],
     "roughness": 0,
     "ior": 1.5,
-    "complexIor": [3.6518, 2.7955, 3.5064, 2.7585, 3.313, 2.6051],
+    "complexIor": [3.45096, 2.96613, 3.51714, 2.7338, 4.02045, 1.90549],
     "density": 19300,
     "category": ["Metal"],
     "description": "",
@@ -1392,12 +1414,12 @@
   },
   {
     "name": "Vanadium",
-    "color": [0.52, 0.532, 0.541],
+    "color": [0.547, 0.525, 0.506],
     "metalness": 1,
-    "specularColor": [0.402, 0.447, 0.395],
+    "specularColor": [0.474, 0.426, 0.175],
     "roughness": 0,
     "ior": 1.5,
-    "complexIor": [3.8114, 2.931, 3.6721, 3.0917, 4.0878, 3.1196],
+    "complexIor": [3.6507, 3.25065, 3.72723, 3.00712, 4.94609, 2.17896],
     "density": 6100,
     "category": ["Metal"],
     "description": "",
@@ -1460,12 +1482,12 @@
   },
   {
     "name": "Zinc",
-    "color": [0.802, 0.844, 0.863],
+    "color": [0.826, 0.842, 0.801],
     "metalness": 1,
-    "specularColor": [0.817, 0.922, 0.964],
+    "specularColor": [0.854, 0.922, 0.923],
     "roughness": 0,
     "ior": 1.5,
-    "complexIor": [3.4161, 7.0325, 1.9286, 6.3963, 1.0424, 5.125],
+    "complexIor": [3.15207, 7.39342, 1.89133, 6.28678, 1.48736, 4.92701],
     "density": 7000,
     "category": ["Metal"],
     "description": "",
diff --git a/deploy/v2/materials.json b/deploy/v2/materials.json
index 889ee7e..3c2f3ac 100644
--- a/deploy/v2/materials.json
+++ b/deploy/v2/materials.json
@@ -1,11 +1,11 @@
 [
   {
     "name": "Aluminum",
-    "color": [0.912, 0.914, 0.92],
+    "color": [0.933, 0.912, 0.853],
     "metalness": 1,
-    "specularColor": [0.97, 0.979, 0.988],
+    "specularColor": [0.981, 0.979, 0.961],
     "roughness": 0,
-    "complexIor": [1.3456, 7.4746, 0.96521, 6.3995, 0.61722, 5.3031],
+    "complexIor": [1.16234, 7.90265, 0.958053, 6.29309, 1.04947, 5.01364],
     "density": [2700, 2700],
     "category": ["Metal"],
     "tags": ["aluminium", "mirror"],
@@ -273,11 +273,11 @@
   },
   {
     "name": "Brass",
-    "color": [0.887, 0.789, 0.434],
+    "color": [0.931, 0.776, 0.392],
     "metalness": 1,
-    "specularColor": [0.988, 0.976, 0.843],
+    "specularColor": [0.995, 0.974, 0.747],
     "roughness": 0,
-    "complexIor": [0.444, 3.695, 0.527, 2.765, 1.094, 1.829],
+    "complexIor": [0.341048, 4.14088, 0.53349, 2.67993, 1.42749, 1.87543],
     "density": [8600, 8600],
     "category": ["Metal"],
     "description": "Brass is an alloy of copper and zinc, with a bright and gold-like appearance. It is similar to bronze, another alloy containing copper that uses tin instead of zinc. Historically, the distinction between the two alloys has been less consistent and clear, and modern practice in museums and archaeology increasingly avoids both terms for historical objects in favor of the more general \"copper alloy\".",
@@ -563,11 +563,11 @@
   },
   {
     "name": "Chromium",
-    "color": [0.638, 0.651, 0.663],
+    "color": [0.653, 0.65, 0.615],
     "metalness": 1,
-    "specularColor": [0.632, 0.718, 0.809],
+    "specularColor": [0.675, 0.72, 0.711],
     "roughness": 0,
-    "complexIor": [3.4256, 4.273, 2.7891, 4.1976, 2.0246, 3.8586],
+    "complexIor": [3.20617, 4.38724, 2.76851, 4.18069, 2.56326, 3.75018],
     "density": [7200, 7200],
     "category": ["Metal"],
     "tags": ["chrome"],
@@ -601,11 +601,11 @@
   },
   {
     "name": "Cobalt",
-    "color": [0.692, 0.703, 0.673],
+    "color": [0.715, 0.702, 0.622],
     "metalness": 1,
-    "specularColor": [0.684, 0.771, 0.817],
+    "specularColor": [0.731, 0.775, 0.715],
     "roughness": 0,
-    "complexIor": [3.5681, 5.0469, 2.7408, 4.7897, 2.0192, 3.9523],
+    "complexIor": [3.33754, 5.27723, 2.6841, 4.73548, 2.57555, 3.81892],
     "density": [8900, 8900],
     "category": ["Metal"],
     "references": [
@@ -818,11 +818,11 @@
   },
   {
     "name": "Copper",
-    "color": [0.926, 0.721, 0.504],
+    "color": [0.988, 0.688, 0.448],
     "metalness": 1,
-    "specularColor": [0.996, 0.957, 0.823],
+    "specularColor": [0.999, 0.946, 0.705],
     "roughness": 0,
-    "complexIor": [0.27105, 3.6092, 0.67693, 2.6248, 1.3164, 2.2921],
+    "complexIor": [0.137212, 5.48257, 0.750114, 2.56138, 1.75582, 2.26828],
     "density": [8940, 8940],
     "category": ["Metal"],
     "references": [
@@ -1181,11 +1181,11 @@
   },
   {
     "name": "Gold",
-    "color": [0.944, 0.776, 0.373],
+    "color": [1.0, 0.72, 0.315],
     "metalness": 1,
-    "specularColor": [0.998, 0.981, 0.751],
+    "specularColor": [1.0, 0.973, 0.597],
     "roughness": 0,
-    "complexIor": [0.18299, 3.4242, 0.42108, 2.3459, 1.3734, 1.7704],
+    "complexIor": [0, 6.3108, 0.487424, 2.18391, 1.74577, 1.63493],
     "density": [19320, 19320],
     "category": ["Metal"],
     "references": [
@@ -1381,11 +1381,11 @@
   },
   {
     "name": "Iron",
-    "color": [0.531, 0.512, 0.496],
+    "color": [0.542, 0.512, 0.458],
     "metalness": 1,
-    "specularColor": [0.571, 0.54, 0.586],
+    "specularColor": [0.612, 0.541, 0.422],
     "roughness": 0,
-    "complexIor": [2.9114, 3.0893, 2.9497, 2.9318, 2.5845, 2.767],
+    "complexIor": [2.73466, 3.14869, 2.94186, 2.92718, 3.15654, 2.46012],
     "density": [7870, 7870],
     "category": ["Metal"],
     "references": [
@@ -1485,11 +1485,11 @@
   },
   {
     "name": "Lead",
-    "color": [0.632, 0.626, 0.641],
+    "color": [0.641, 0.622, 0.59],
     "metalness": 1,
-    "specularColor": [0.803, 0.808, 0.862],
+    "specularColor": [0.819, 0.804, 0.769],
     "roughness": 0,
-    "complexIor": [1.91, 3.51, 1.83, 3.4, 1.44, 3.18],
+    "complexIor": [1.81659, 3.50606, 1.84441, 3.37971, 1.96022, 3.23189],
     "density": [11340, 11340],
     "category": ["Metal"],
     "references": [
@@ -1615,11 +1615,11 @@
   },
   {
     "name": "Mercury",
-    "color": [0.781, 0.779, 0.779],
+    "color": [0.799, 0.777, 0.721],
     "metalness": 1,
-    "specularColor": [0.879, 0.91, 0.941],
+    "specularColor": [0.901, 0.91, 0.89],
     "roughness": 0,
-    "complexIor": [2.0733, 5.3383, 1.5523, 4.651, 1.0606, 3.8628],
+    "complexIor": [1.86932, 5.36989, 1.53811, 4.60484, 1.4963, 3.92685],
     "density": [13546, 13546],
     "viscosity": [1.552, 1.552],
     "category": ["Metal"],
@@ -1825,11 +1825,11 @@
   },
   {
     "name": "Nickel",
-    "color": [0.649, 0.61, 0.541],
+    "color": [0.664, 0.606, 0.495],
     "metalness": 1,
-    "specularColor": [0.797, 0.801, 0.789],
+    "specularColor": [0.824, 0.798, 0.68],
     "roughness": 0,
-    "complexIor": [2.0592, 3.7574, 1.8179, 3.2741, 1.621, 2.6933],
+    "complexIor": [1.88896, 3.7543, 1.81884, 3.2447, 2.0708, 2.64853],
     "density": [8900, 8900],
     "category": ["Metal"],
     "references": [
@@ -2257,11 +2257,11 @@
   },
   {
     "name": "Platinum",
-    "color": [0.679, 0.642, 0.588],
+    "color": [0.695, 0.638, 0.541],
     "metalness": 1,
-    "specularColor": [0.785, 0.789, 0.784],
+    "specularColor": [0.816, 0.786, 0.671],
     "roughness": 0,
-    "complexIor": [2.3757, 4.2655, 2.0847, 3.7153, 1.8453, 3.1365],
+    "complexIor": [2.1755, 4.28265, 2.0879, 3.67782, 2.35677, 3.05144],
     "density": [21450, 21450],
     "category": ["Metal"],
     "references": [
@@ -2535,10 +2535,11 @@
   },
   {
     "name": "Silicon",
-    "color": [0.344, 0.367, 0.419],
+    "color": [0.351, 0.367, 0.394],
     "metalness": 1,
+    "specularColor": [0.081, 0, 0.004],
     "roughness": 0,
-    "complexIor": [3.835, 0.014, 4.073, 0.028, 4.673, 0.095],
+    "complexIor": [3.63351, 0.966245, 4.06958, 0, 4.36103, 0],
     "density": [2330, 2330],
     "category": ["Metal"],
     "references": [
@@ -2578,11 +2579,11 @@
   },
   {
     "name": "Silver",
-    "color": [0.962, 0.949, 0.922],
+    "color": [0.984, 0.946, 0.851],
     "metalness": 1,
-    "specularColor": [0.999, 0.998, 0.998],
+    "specularColor": [0.999, 0.998, 0.986],
     "roughness": 0,
-    "complexIor": [0.15943, 3.9291, 0.14512, 3.19, 0.13547, 2.3808],
+    "complexIor": [0.0636949, 3.69295, 0.155409, 3.20559, 0.426839, 3.12206],
     "density": [10500, 10500],
     "category": ["Metal"],
     "tags": ["mirror"],
@@ -3273,11 +3274,11 @@
   },
   {
     "name": "Titanium",
-    "color": [0.616, 0.582, 0.544],
+    "color": [0.633, 0.578, 0.503],
     "metalness": 1,
-    "specularColor": [0.689, 0.683, 0.689],
+    "specularColor": [0.728, 0.68, 0.55],
     "roughness": 0,
-    "complexIor": [2.7407, 3.8143, 2.5418, 3.4345, 2.267, 3.0385],
+    "complexIor": [2.55584, 3.89385, 2.52916, 3.39243, 2.8235, 2.85229],
     "density": [4540, 4540],
     "category": ["Metal"],
     "references": [
@@ -3347,11 +3348,11 @@
   },
   {
     "name": "Tungsten",
-    "color": [0.504, 0.498, 0.478],
+    "color": [0.518, 0.495, 0.442],
     "metalness": 1,
-    "specularColor": [0.403, 0.418, 0.423],
+    "specularColor": [0.461, 0.413, 0.206],
     "roughness": 0,
-    "complexIor": [3.6518, 2.7955, 3.5064, 2.7585, 3.313, 2.6051],
+    "complexIor": [3.45096, 2.96613, 3.51714, 2.7338, 4.02045, 1.90549],
     "density": [19300, 19300],
     "category": ["Metal"],
     "references": [
@@ -3384,11 +3385,11 @@
   },
   {
     "name": "Vanadium",
-    "color": [0.52, 0.532, 0.541],
+    "color": [0.547, 0.525, 0.506],
     "metalness": 1,
-    "specularColor": [0.402, 0.447, 0.395],
+    "specularColor": [0.474, 0.426, 0.175],
     "roughness": 0,
-    "complexIor": [3.8114, 2.931, 3.6721, 3.0917, 4.0878, 3.1196],
+    "complexIor": [3.6507, 3.25065, 3.72723, 3.00712, 4.94609, 2.17896],
     "density": [6100, 6100],
     "category": ["Metal"],
     "references": [
@@ -3558,11 +3559,11 @@
   },
   {
     "name": "Zinc",
-    "color": [0.802, 0.844, 0.863],
+    "color": [0.826, 0.842, 0.801],
     "metalness": 1,
-    "specularColor": [0.817, 0.922, 0.964],
+    "specularColor": [0.854, 0.922, 0.923],
     "roughness": 0,
-    "complexIor": [3.4161, 7.0325, 1.9286, 6.3963, 1.0424, 5.125],
+    "complexIor": [3.15207, 7.39342, 1.89133, 6.28678, 1.48736, 4.92701],
     "density": [7000, 7000],
     "category": ["Metal"],
     "references": [
diff --git a/schemas/schema-materials-v2.json b/schemas/schema-materials-v2.json
index 3a36f6c..95790c0 100644
--- a/schemas/schema-materials-v2.json
+++ b/schemas/schema-materials-v2.json
@@ -27,7 +27,7 @@
         "default": 0
       },
       "specularColor": {
-        "description": "Color of the specular reflection (controls the physical edge-tint for metals), calculated from Complex IOR n and k values.",
+        "description": "Color of the specular reflection (controls the physical edge-tint for metals), calculated from spectral data using script from https://github.com/natyh/material-params",
         "type": "array",
         "items": {
           "type": "number"
@@ -67,7 +67,7 @@
         "default": 0
       },
       "complexIor": {
-        "description": "Complex IOR values, n (refractive index), and k (extinction coefficient), for each color channel, in the following order: nR, kR, nG, kG, nB, kB. Calculated from spectral IOR data files.",
+        "description": "Complex IOR values, n (refractive index), and k (extinction coefficient), for each color channel, in the following order: nR, kR, nG, kG, nB, kB. Calculated from spectral data using script from https://github.com/natyh/material-params",
         "type": "array",
         "items": {
           "type": "number"
diff --git a/schemas/schema-materials.json b/schemas/schema-materials.json
index e285bc2..5585271 100644
--- a/schemas/schema-materials.json
+++ b/schemas/schema-materials.json
@@ -27,7 +27,7 @@
         "default": 0
       },
       "specularColor": {
-        "description": "Color of the specular reflection (controls the physical edge-tint for metals), calculated from Complex IOR n and k values.",
+        "description": "Color of the specular reflection (controls the physical edge-tint for metals), calculated from spectral data using script from https://github.com/natyh/material-params",
         "type": "array",
         "items": {
           "type": "number"
@@ -67,7 +67,7 @@
         "default": 0
       },
       "complexIor": {
-        "description": "Complex IOR values, n (refractive index), and k (extinction coefficient), for each color channel, in the following order: nR, kR, nG, kG, nB, kB. Calculated from spectral IOR data files.",
+        "description": "Complex IOR values, n (refractive index), and k (extinction coefficient), for each color channel, in the following order: nR, kR, nG, kG, nB, kB. Calculated from spectral data using script from https://github.com/natyh/material-params",
         "type": "array",
         "items": {
           "type": "number"