Keystone Tiles offers a wide range of high-quality tiles, but the best ones are generally determined by factors such as material, design, and durability. The best Keystone Tiles include those made from porcelain or ceramic, featuring modern designs, and with a good reputation for long-lasting performance. Porcelain tiles, in particular, are highly favored for their strength and water resistance, making them ideal for both residential and commercial applications.

The preference for porcelain and ceramic tiles is supported by industry data. According to the American Ceramic Tile Institute, porcelain tiles are the most popular choice for flooring due to their durability and ease of maintenance. Porcelain tiles have a water absorption rate of less than 0.5%, which makes them highly resistant to moisture and stains. This is crucial for areas like kitchens and bathrooms where tiles are frequently exposed to water. Additionally, the National Tile Contractors Association reports that ceramic tiles are the most commonly used tiles in the United States, with over 80% of all tile installations being ceramic. This widespread adoption is a testament to the tiles' quality and versatility.

Keystone Tiles' porcelain and ceramic tiles are also known for their aesthetic appeal. The company offers a diverse range of designs, from classic patterns to contemporary styles, catering to various architectural and design preferences. This versatility ensures that homeowners and professionals can find tiles that complement their specific project needs. For instance, Keystone Tiles' porcelain tiles are available in a variety of finishes, including matte, glossy, and textured, allowing for a customized look in any space.

Furthermore, Keystone Tiles' commitment to sustainability is a significant factor in their tiles' overall quality. The company uses eco-friendly materials and manufacturing processes, which not only reduce their environmental impact but also contribute to the tiles' long-term performance. This focus on sustainability is becoming increasingly important to consumers who are conscious of the environmental footprint of their home improvement projects.

In conclusion, the best Keystone Tiles are those made from porcelain or ceramic, featuring modern designs, and with a strong reputation for durability and sustainability. These tiles are not only visually appealing but also practical for a wide range of applications. The industry data and consumer trends further underscore the superior quality and popularity of these tiles in the United States.