The surface of all Granite, Marble and Quartzite contain Fissures, Natural Veining and Surface Deviations. Fissures can be defined  as " a visible natural seperation in the stone and is not to be confused with a  crack in the stone". Natural Stones come from the Earths Crust so NO two pieces of stone are ever exactly the same. Even very consistent stones will have small amounts of variation, including colors that are lighter or darker.  .  We HIGHLY recommend coming to StoneCrafters to touch and feel the slab before purchasing  your new countertop.