{
  "name": "GemsMakers \u2014 2,700+ Interactive Scientific, Engineering & Bullion Labs",
  "short_name": "GemsMakers",
  "description": "2,700+ free online scientific, engineering, bullion melt, horology escapement, and physics calculators.",
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  "scope": "/",
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  "orientation": "any",
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    "utilities",
    "finance",
    "productivity",
    "games"
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  "shortcuts": [
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      "name": "Bullion & Gold Lab",
      "short_name": "Gold",
      "description": "Melt values, scrap alloy fineness & specific gravity",
      "url": "/gold.php",
      "icons": [
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      "name": "Horology & Watches Lab",
      "short_name": "Watches",
      "description": "Movement accuracy, beat error & lift angles",
      "url": "/watches.php",
      "icons": [
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        }
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    {
      "name": "Civil & Structural Engineering",
      "short_name": "Structural",
      "description": "Beam deflection, section modulus & AISC steel",
      "url": "/construction.php",
      "icons": [
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          "src": "/icons/icon-192.png",
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    {
      "name": "Astrophysics & 3D Space Atlas",
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      "description": "Planetary ephemeris & Laplace resonance",
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      "icons": [
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        }
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    {
      "name": "Paleontology & Fossil Lab",
      "short_name": "Fossils",
      "description": "Biostratigraphy & allometric tooth calculators",
      "url": "/fossils.php",
      "icons": [
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          "src": "/icons/icon-192.png",
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        }
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    },
    {
      "name": "HTML5 Physics Arcade",
      "short_name": "Gaming",
      "description": "60 FPS browser physics games & puzzles",
      "url": "/gaming.php",
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}