Is it possible to trim slab granite (1" thick) with a circular saw?

I purchased up a stunning granite slab remnant and wish to use this as a top for a sideboard. However, the cost to cut a usable top from this remnant is roughly equal to the cost of the granite remnant itself. A friend suggested it might be possible to do this myself using a circular saw, but I don't want to risk a crack or damage without first knowing whether it's possible to 'do it yourself'. Any advice would be appreciated.

thanks,
roger