Calacatta is a precious Italian marble and has been used since the renaissance. This classic marble sets no limits to the imagination. A white background with black, gray and gold veins creates a warm atmosphere and adds a unique touch when used with different materials.
Castelli puts a Resin backing on some of their stones to reinforce/strengthen it during processing, shipping, and install.
This Resin backing requires the use of an Epoxy Thinset or Epoxy Additive during installation
Common stones that will have this are Nero St. Gabriel, Rosewood, Calacatta, Statuary, etc.