We have been renovating a 19th century granite cottage. We have decided to keep one wall, with the fireplace, as exposed stone. The stone is mainly granite. The wall has originally been built using a lime mortar. We wanted to have the wall re-pointed in order to bring out the chracter of the stone and to make good the crumbling mortar pointing. We have just had this done by a builder who has worked in thos area for over 50 years. however, he has used a cement and builder sand mixture as the mortar. We have since found information on the web that says that lime based mortar should never, if possible, be replaced with cement. we are now considering removing the cement and replacing it with lime based mortar. It seems a drastic step and wondered if any one has encountered this before? should we leave the cement to dty out completely before removal? Any other thought would be welcome.