Files:
Ktenasite1.jpg
Ktenasite2.jpg
Ktenasite_Best.jpg
Ktenasite_220725.jpg

Ktenasite2.jpg and Ktenasite_Best.jpg have scale bars

In Ktenasite_220725.jpg, the crystals were placed on a piece of glass which was sitting on top of mm-ruled graph paper
The graph paper is white with blue rules.  The white balance in this image needs correcting.

Black is CuO
