This antique white marble keystone is a beautiful piece of architectural salvage with its original back plate intact. The piece is made of high quality marble and has a stunning white color. The keystone is an antique original, making it a unique and rare find.

The material used in this piece is marble, which is known for its durability and timeless beauty. It has features that make it an excellent choice for anyone looking for a unique decorative element, especially in a fireplace mantel or other architectural applications. This piece is perfect for collectors and enthusiasts who appreciate antique architectural salvage.