Appears broken or sheared .
Very soft, easily scratched with fingernail. Composed of very thin sheets, some small pieces have flaked off, but not any large sheets. Also highly transparent, the orange staining on one side can be seen clearly through the good face.
From my great-grandfathers collection - I was told most came from Colorado, especially the Grand County area. Gypsum, CO is a couple hours away. He also brought some stuff home from Arizona.
Edit: Added photo.