Vetrazzo® Countertops: Fragments of glass in various colors are combined with a concrete base to create a sustainable and eco-friendly countertop material. All of the glass used is 100% recycled and is 85% of the total material. All it requires is a bi-yearly sealing and daily cleaning with soap and water. This surface is less porous than marble and concrete making it very similar to Granite. It is comparable to granite in strength, scratch resistance, heat resistance, durability, and care & maintenance.