Cast Stone Keystones

Cast Stone Keystones


Cast Stone Keystones


Engineered Limestone Keystones ship next business day.

For Distributors: For unbranded packaging, please specify "Blind Ship" in the special instructions on the next page.

Estimated shipping duration

Every Build-A-Stone address stone is cast with precision, excellent craftsmanship, and attention to detail. Our engineered limestone keystones mimic the look of natural stone, but our product is much stronger and more affordable. They’re also less porous, and so, more moisture resistant.

The color of the stone displayed on the site provides a visual of the natural stone color you will receive when you order.

We offer Keystones in four sizes for all standard applications. The typical stone sizes for each application are as follows.

Application - Depth x Height x Width (Top) x Width (Bottom)

Full-Depth Masonry Keystone Tall -  4-1/8” x 11 5/8” x 11 5/8” x 6 5/8” 
Full-Depth Masonry Keystone Short -  4-1/8” x 7 5/8” x 7 5/8” x 6 5/8” 
Thin Keystone Tall -  2” x 11 5/8” x 11 5/8” x 6 5/8”
Thin Keystone Short - 2” x 7 5/8” x 7 5/8” x 3-5/8”

All keystones feature a 1/2" chamfer

All orders are shipped out on the next business day. If you want to see how soon the stone will arrive, please click on “Estimated Shipping Duration” on the “Order Stones” page. 

Be sure to create an account at checkout so that you have access to a history of your orders and track orders currently in progress. This will also save your information for faster checkout. Account information and all transactions are secure and encrypted.

For unbranded packaging, please specify "Blind Ship" in the special instructions on the next page. If you would like to a display board for your showroom, please feel free to contact us!

Double check the details of your order before completing your order. All sales are final. If Build A Stone makes a mistake on your order, you will receive a replacement stone or refund. Just call and talk to us!

If you desire options not available here, please contact us at and we would be happy to provide custom pricing for your consideration.