New answers tagged crack
Your picture IS worth a thousand words! Is the stone a fascia or veneer in front of the bearing wall? Or is the stone the actual foundation for the structure? That's a window sill in the photo? Lastly, how old is the stonework? If it's just a façade of stone you may be able to reason the crack developed from settling. But it would be wise to monitor it. But ...
Most mortar is about the same color, so you have a good chance of a close match. You can purchased premixed mortar repair in a tube for a calking gun like this product: Quickrete Mortar repair
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