Rock Slab Display Stand

A variety of stands for holding rock slices, etc. Useful for displaying random neat stuff that is in slice form. Three different sizes for three different rock sizes. 77 degree angle of repose for the dimensionally inclined. Testing data included to assist anyone wondering if these will work for their application. Glam shots of my rocks included because my rocks are awesome.

Tested, successful:
Rocks
Arduino and arduino knockoffs
Putty knife
Water (solid)

Tested, failure:
Cat
Water