In the archive 3d models of Patagonia quartzite slabs
Corona Legacy material is configured with Volumetric Scattering and a special map that provides uneven clearance of transparent marble inclusions
This stone also looks great without backlighting.

Also added 2 butterfly options (symmetrical texture)
The size of the maximum continuous texture for wall covering is 6.8 m (height 2.6 m)

The texture is not seamless

Resolution 8000x3000px