You might try D/2 biological solution. We use this all the time on things like this. Here is the link. 

http://www.d2bio.com/?_vsrefdom=adwords&gclid=Cj0KCQjwsZHPBRClARIsAC-VMPD0q-StxQvQUY2XYc4okwSl1ig6LUmqC11rCXds31PaUZut095r4mwaApw1EALw_wcB


________________________________________
From the desk of
Baird Standish
Managing Partner
Facility Specialists, LLC
15 West Highland Ave. Suite E
Philadelphia, PA 19118
Phone: 215-732-7505
Fax: 215-546-9160
www.facspecs.com

On Oct 16, 2017, at 9:48 PM, Anthony Godoy <agodoy4894@gmail.com> wrote:

Hi partners,

What would be the best way to go about removing the mold on this stone? 

 
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