Two Grey Banded Agate Slabs

Rio Grande do Sul, Brazil
The first slab has black druze lining the interior cavity, milky white borders and bands of grey, with compete boulder edges visible, diameter 6 1/2 in, the second with a highly unusual milky white core of lozenge-shaped form surrounded by grey banding, white borders, alternating with grey borders with some translucency, and boulder surface to the edges, diameter 7 in. (2)