The masonry gallery Bric consists of a collection of images that are nested within a div container Bric that has its Type set to Masonry Container. The masonry container works by placing the items within it, in an optimal position based on available vertical space (a bit like a mason fitting stones in a wall).
Adding a Light box
By default, the images within a masonry Bric do not have any interactions applied to them. However, it is possible to apply any of the available interactions to any of the images within a masonry container, including the light box interaction. You can read more about applying interactions here.