Precious Metals and Purity Standards - JSON

[
  {
    "code": "AU",
    "slug": "gold",
    "name": "Gold",
    "description": "The most valuable precious metal, with purity expressed in karats (24 parts).",
    "chemicalSymbol": "Au",
    "atomicNumber": 79,
    "purityStandards": [
      {
        "mark": "K24 / 999 / 999.9",
        "fineness": 999,
        "percentage": 99.9,
        "description": "Pure gold / 24 karat. Highest purity, used for bullion and investment."
      },
      {
        "mark": "K22 / 916",
        "fineness": 916,
        "percentage": 91.6,
        "description": "22 karat. Widely used in traditional jewelry in India and the Middle East."
      },
      {
        "mark": "K20 / 835",
        "fineness": 835,
        "percentage": 83.5,
        "description": "20 karat. Traditional European standard, less common today."
      },
      {
        "mark": "K18 / 750",
        "fineness": 750,
        "percentage": 75,
        "description": "18 karat. Most common for jewelry. Good balance of hardness and beauty."
      },
      {
        "mark": "K14 / 585",
        "fineness": 585,
        "percentage": 58.5,
        "description": "14 karat. Common in Europe and America. More affordable than K18 in Japan."
      },
      {
        "mark": "K12 / 500",
        "fineness": 500,
        "percentage": 50,
        "description": "12 karat. Minimum purity for jewelry in Japan."
      },
      {
        "mark": "K10 / 416",
        "fineness": 416,
        "percentage": 41.6,
        "description": "10 karat. Common in the USA. May not be recognized as precious metal in Japan."
      },
      {
        "mark": "K9 / 375",
        "fineness": 375,
        "percentage": 37.5,
        "description": "9 karat. Common minimum standard in UK and Europe."
      }
    ],
    "colors": [
      {
        "name": "Yellow Gold",
        "alloy": "Silver, Copper",
        "description": "Classic warm yellow appearance"
      },
      {
        "name": "White Gold",
        "alloy": "Palladium, Nickel, Zinc",
        "description": "Silvery-white appearance, often rhodium plated"
      },
      {
        "name": "Rose Gold",
        "alloy": "Copper (higher ratio)",
        "description": "Pinkish-copper tone"
      }
    ]
  },
  {
    "code": "AG",
    "slug": "silver",
    "name": "Silver",
    "description": "Purity expressed in millesimal fineness, with SV925 being the most common standard.",
    "chemicalSymbol": "Ag",
    "atomicNumber": 47,
    "purityStandards": [
      {
        "mark": "SV1000 / Ag999 / Ag1000",
        "fineness": 999,
        "percentage": 99.9,
        "description": "Fine silver. Used for bullion and crafts. Very soft."
      },
      {
        "mark": "SV950",
        "fineness": 950,
        "percentage": 95,
        "description": "Britannia silver. High purity silver used in the UK."
      },
      {
        "mark": "SV925",
        "fineness": 925,
        "percentage": 92.5,
        "description": "Sterling silver. Most common standard for jewelry and tableware."
      },
      {
        "mark": "SV900",
        "fineness": 900,
        "percentage": 90,
        "description": "Coin silver. Used in old silver coins and some jewelry."
      },
      {
        "mark": "SV800",
        "fineness": 800,
        "percentage": 80,
        "description": "Common European standard. Used for tableware and decorative items."
      }
    ]
  },
  {
    "code": "PT",
    "slug": "platinum",
    "name": "Platinum",
    "description": "Highly rare precious metal with purity expressed in millesimal fineness. Pt900 is common.",
    "chemicalSymbol": "Pt",
    "atomicNumber": 78,
    "purityStandards": [
      {
        "mark": "Pt1000 / Pt999",
        "fineness": 999,
        "percentage": 99.9,
        "description": "Pure platinum. Used for bullion and industrial applications."
      },
      {
        "mark": "Pt950",
        "fineness": 950,
        "percentage": 95,
        "description": "High purity platinum. Widely used for engagement and wedding rings."
      },
      {
        "mark": "Pt900",
        "fineness": 900,
        "percentage": 90,
        "description": "Most common for Japanese jewelry. Good balance of hardness and luster."
      },
      {
        "mark": "Pt850",
        "fineness": 850,
        "percentage": 85,
        "description": "Minimum purity recognized as precious metal in Japan."
      },
      {
        "mark": "Pt500",
        "fineness": 500,
        "percentage": 50,
        "description": "Minimum purity recognized in the UK."
      }
    ]
  },
  {
    "code": "PD",
    "slug": "palladium",
    "name": "Palladium",
    "description": "Platinum group element with a white luster similar to platinum.",
    "chemicalSymbol": "Pd",
    "atomicNumber": 46,
    "purityStandards": [
      {
        "mark": "Pd1000 / Pd999",
        "fineness": 999,
        "percentage": 99.9,
        "description": "Pure palladium. Used for bullion and industrial applications."
      },
      {
        "mark": "Pd950",
        "fineness": 950,
        "percentage": 95,
        "description": "Most common for jewelry. Elegant luster similar to platinum."
      },
      {
        "mark": "Pd900",
        "fineness": 900,
        "percentage": 90,
        "description": "Common purity for Japanese jewelry and accessories."
      },
      {
        "mark": "Pd500",
        "fineness": 500,
        "percentage": 50,
        "description": "Minimum purity recognized in the UK."
      }
    ]
  },
  {
    "code": "RH",
    "slug": "rhodium",
    "name": "Rhodium",
    "description": "Platinum group element primarily used for plating applications.",
    "chemicalSymbol": "Rh",
    "atomicNumber": 45,
    "purityStandards": [
      {
        "mark": "Rh",
        "fineness": 999,
        "percentage": 99.9,
        "description": "Pure rhodium. Used for plating applications."
      }
    ]
  },
  {
    "code": "IR",
    "slug": "iridium",
    "name": "Iridium",
    "description": "The densest platinum group element.",
    "chemicalSymbol": "Ir",
    "atomicNumber": 77,
    "purityStandards": []
  },
  {
    "code": "RU",
    "slug": "ruthenium",
    "name": "Ruthenium",
    "description": "Platinum group element widely used in industrial applications.",
    "chemicalSymbol": "Ru",
    "atomicNumber": 44,
    "purityStandards": []
  },
  {
    "code": "OS",
    "slug": "osmium",
    "name": "Osmium",
    "description": "One of the densest elements, used in industrial applications.",
    "chemicalSymbol": "Os",
    "atomicNumber": 76,
    "purityStandards": []
  }
]