Critical mineral veins
![Gray with bits of white cylinder-shaped vein intersected in drill core. Silver pencil next to core for size.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/media/images/A%20fluorite-lepidolite-wolframite%20vein.jpg?itok=eidOMzO1)
Detailed Description
A fluorite-lepidolite-wolframite vein intersected in drill core from the Lost River Sn-W mine, Seward Peninsula, Alaska. Lepidolite is a lithium-bearing mica, and wolframite an ore of tungsten.
Sources/Usage
Public Domain.
Photo by George Case, U.S. Geological Survey