Here are some grains of red sand from the Namibian desert.
It's mostly quartz that has a fine coating of "Hematite", a red oxide of iron. You can see thicker areas of the iron oxide in the crevices on the grains.
I used incident light and low intensity transmitted cross polarised light. It's a stacked image with the background cleaned up in photoshop.
Red Namibian sand
Moderators: rjlittlefield, ChrisR, Chris S., Pau
-
- Posts: 713
- Joined: Thu Mar 14, 2013 11:40 am
- Location: Atlanta, GA, USA
- carlos.uruguay
- Posts: 5358
- Joined: Thu Feb 23, 2012 8:05 pm
- Location: Uruguay - Montevideo - America del Sur
- Contact: