The photos speak for themselves on this specimen. I liken it to a waterfall of blue baryte cascading over the edge. I can't imagine how this formed, other than under ideal conditions. The crystals are the most basic forms of Baryte which are tabular with slight elongations on the a or b axis with the sharp corner pointed parallel along the lines of formation but with a divergent habit. Look at the photo, you'll see what I mean. Incredible piece. No damage, sits nice with a light blue color with some frosted white areas.
Baryte
Formula
BaSO4
Crystal System
Orthorhombic
Crystal Habit
Tabular, Prismatic, Massive - Fibrous
Cleavage
Perfect, Perfect, Imperfect
Luster
Vitreous (Glassy)
Color
white, yellowish white, grayish white, brownish white, dark brown