This is a rich, lustrous, colorful cluster on matrix from the most famous pocket of the species (early 1980s), and a stunning thumbnail when put in an exhibit case. It has a bright open color, not the dark and dull look of many ludlamite finds. You almost never see these for sale and they remain a historic classic. From the award-winning thumbnail collection of Sharon and William Panczner, author of the book Minerals Of Mexico, and last seen and exhibited in the 1960s.