While no countertop material is truly “heatproof,” granite countertops are extremely resistant to high temperatures. Some types of granite can withstand temperatures up to 1,200 degrees Fahrenheit. However, we don’t recommend placing hot pots and pans directly on granite countertops. Even if it doesn’t scar the granite, it may damage the sealant.

The minimum counter depth for a kitchen island is around the same as for a standard kitchen countertop, which is around 25 to 26 inches. This depth allows adequate room for food preparation, dining, and working on the island. However, as with other kitchen countertops, depth can vary based on specific needs and preferences in your household.

The easiest way to calculate a countertop's square footage is to divide your countertop into squares and rectangles, then multiply the length and the width of each piece in inches before adding them together and dividing by 144.

Yes, onyx countertops can scratch easily—especially if they’re not adequately sealed. But with the proper maintenance (which includes re-sealing the countertops to protect them from damage), you can prevent your onyx countertops from scratching and repair any damage quickly to prevent it from worsening.