With ordinary use and common-sense precautions, it is highly unlikely to crack the natural stone. Granite is most susceptible to cracking during transportation and installation. Normal use will not overstress this durable material. You should not stand or sit on your natural stone countertops. Depending on the installation, you may need to support your countertop, especially an island overhang. Your stone supplier, fabrication, and installation team should advise on the need for support.