Granite, marble and quartzite are formed by nature, not in a factory. Fissures, small pits, mineral spots and color shifts across a slab are normal, and natural stone generally does not come with a manufacturer warranty the way quartz does.
A fissure is a natural line in the stone that you can see but usually cannot feel, and it is not a defect. A crack runs through the stone and often catches a fingernail. If you are not sure which you have, read our guide to a crack in a granite countertop.
The best protection is seeing your slab before it is cut. We review the slab and layout with you as part of our process, so the character you approve is the character you get.