Sawn bed Eramosa building stone is a durable, high-density limestone from Southwestern Ontario, known for its distinctive brown and grey “tiger stripe” grain pattern. The “sawn bed” refers to the specific processing that creates a consistent bed depth for easier installation. Aesthetics: Eramosa limestone features a unique, pronounced fleuri or “tiger stripe” pattern with colors ranging from light grey to dark brown. If installed outdoors, the sun may bleach the stone over time to a lighter grey. Sawn bed Eramosa stone is processed to have a consistent thickness (bed depth) and height, which allows for a more uniform look and easier installation, often in an ashlar pattern with a standard 0.5-inch mortar joint.