Q. wondering if the silica sand would scratch the granite.

A. This link below reads silica sand is rated 6-7 on the mohs scale. It
seems that granite ranges from 6.5 to 7.5. To answer your question if the
silica sand was to come loose in the restoration process there is a good
chance it would scratch the granite.

http://www.reade.com/Particle_Briefings/mohs_hardness_abrasive_grit.html

http://www.graniteland.com/infos/home/mechanical-properties-stone

On 2/2/12 8:42 PM, "Mike Marsoun" <nulifesc@bigpond.com> wrote:

> Looking at a job with black absolute, and cashmere that will have to be
> flattened and polished. Was thinking of using copper resins. Black border,
> hallways, and bathrooms...fun stuff!  It has sanded grout (as usual) wondering
> if the silica sand would scratch the granite. There is an area outdoors that
> has been flattened, and I can see some suspicious looking scratches...
> Comments?