“Deep emerald green crystals of tangeite shoot out from a vug of framboidal black braunite. The white coating is some sort of clay. Travis Olds 2011. 149 mm tube- Raynox DCR 250- Thorlabs aperture- Mitutoyo M Plan Apo 10x FOV: cropped to 2.0 mm Diffused LED lighting Helicon Focus-depth map; 34 images”