Microscopic Gold and Lead Particles
By Geology, Geophysics, and Geochemistry Science Center
2015 (approx.)
![microscopic gold and lead particles](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/USGS_Gold_Particle.png?itok=6_SGS2uX)
Detailed Description
Microscopic gold and lead particles surrounded by organic and phosphorus-rich material in a municipal biosolids sample (combined surface topography and atomic weight images).
Sources/Usage
Public Domain.