Sources & Research Method
Primary sources used for gold materials, aerospace, recycling and publishing information.
- U.S. Geological Survey — Gold Statistics and Information
- USGS — Mineral Commodity Summaries 2026: Gold
- NIST — Physical properties reference table
- NASA — Spacecraft thermal-control basics
- NASA Spinoff — Gold Coating
- U.S. EPA — Electronics recycling
- Google AdSense — Privacy disclosures
- Google AdSense — IAB Europe TCF