Charing Cross is a gold tone ashlar style natural limestone veneer.  The stone is a blend of two different faces of the stone slabs extracted from the same quarry.  Charing Cross’s longer thinner pieces are split face and show the interior part of the limestone exposed with a hydraulic press.  The tops and bottoms of the split face pieces are natural with the heights varying based on how thick the stone layer was in the quarry.  The larger rectangular castle rock type pieces show the bedface.  These are the tops and bottoms of the large stone slabs cut into rectangles.  The bedface term describes the flat surface or bed of the quarry you walk across.  In construction, the term hitting bedrock is used to describe hitting the flat stone layer.