Quote:
Originally Posted by Dee8go
The motar joints don't look too bad either. 
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It's actually "mortar" partner.
The stone does look to be a sandstone material and I would also suspect the damage shown is freeze/thaw related.
To identify, talk to local brick yards about the types of stones that were available locally in your area when the house was constructed.
Is difficult to tell the extent of damage from the close-ups, but obviously needs to be sealed to prevent moisture absorbing into the stone.