Masks and respirators.
For these workers, there's no such thing as an N-95 that works.
These aren't people who can afford $1,500 for a full blown PAPR.
As to the owners, that stuff will go everywhere in the house.
Then there's the cleanup, including clothes, unless you think the kids should be breathing that stuff too.
Silicosis can show up decades later.
The status of granite isn't worth that kind of hazard.