White blotches on black granite

Q. About 4 years ago we purchased what we thought to be an absolute black granite headstone from Lexington Blue Granite in Georgia. It has developed white blotches that we cannot remove. We have contacted the manufacturer and they sent us some manganesed Phospholene #7 to clean with. We have not cleaned yet. Have some digital pictures but cannot attach to send them. Would like for you to view them. some pictures that indicate the problem. can you make a suggestion.

 

A.Yep-pictures would be helpful.

Send them to mail@stoneshine.com and I will reply to you.

Manganesed stuff is for rust but may work on your stone.

I don't think it will hurt it.

 

Stu Rusen