BITTO Quartz Surfaces are extreme hard which are far harder than other brands. Its Mohs hardness can reach 6.5. free samples Only three other natural minerals diamond, sapphire and topaz are harder that quartz,making BITTO naturally scratch-resistant. While a careless slip of the knifewill scratch other countertops such as laminates and some granites, it won't leavea mark on BITTO. BITTO is not ...