What is lamination (laminate)?
 
Laminated edge is: additional strip (at least one narrow strip of matching natural stone) what’s glued underneath the edge, it makes the countertop look thicker. However, it creates a seam, which runs horizontally along the edge. In most cases this is not a problem and virtually unnoticeable, but the seam may be visible depending on the color and pattern of the granite, marble, travertine, limestone, etc.

If stone has more consistent patterns it will "hide" a seam better, than lighter countertops colors with lots of "movement" in their pattern.