I know its not recomended for stone work, but, if i have as many time that it takes, will it do the small job that i need? (I heard that drops of water can make a hole in a stone.)

Im planning to cut mostly soft limeston.
Im planning to use a diamond bit like the dremel 7134 or 7144 or 7103.
Im planning to creat a circle of about 20mm diameter, and 3mm deep in the stone.
Im planning to go very very slow.

Will it do the job?

I thought to make the first 3mm hole by hand and let the bit engrave only sideways in a few layers

What are the x,y speeds i need to go to be more than safe?