PA Limestone - Our PA Limestone is an unique grey stone with a just a small tint of blue. These look especially charming on the front of buildings of all sizes. Shown below is a house that was newly constructed in 2005. The builder and the home owner both agreed that the PA limestone would match the house and it turned out to compliment this home very well. Our Veneer stone adds color, texture, personality, and a higher resale value to this beautiful home.