We have been using these beautiful and eco-friendly countertops in all of our homes this season. Many of Silestone colors are made up of post consumer recycled glass, specifically the color "Dali," which is composed of more than 70% recycled glass. In addition, the Stellar Series, Coffee Brown and Absolute Green contain 35% content. Silestone also has the GREENGUARD Certification, an industry-independent, third-party testing program for low-emitting products and materials. Therefore, because the countertops have low to no emissions of toxic chemicals, they contribute to better air quality inside your home.