Processed to 4886 feet, flaky green secondary mineralization

Today we boxed rock core to a depth of 4886 ft, 170 ft deeper than two days ago.  We saw one intrusion that was only a couple feet thick, and overall less secondary minerals than we've become used to seeing.  However, one fracture in particular showed quite a deposit (photo shows about eight inches from top to bottom):

 

At the time of the photo, this material was still wet and showed this striking green color.  When it dries however, it becomes a pale green and doesn't contrast as well with the surrounding rock.