There is no hard and fast rule for what makes one granite a higher grade than the other but the grading stays relatively consistent across the industry.
What is higher grade than granite.
Generally speaking commercial grade granite has a lot of soft minerals dispersed throughout and less color variation than higher quality cuts of granite.
Low grade granite is often termed commercial grade though mid or high grade slabs are sold at a thickness of either 3 4 inch or 1 1 4 inch a low grade granite slab is.
Commercial grade granite tends to be softer in minerals and has less variety of colors than mid grade or high quality granite.
Granite is given its grade based on the retailer s standards.
There are generally three levels of granite which include commercial builder grade granite mid grade granite and high quality granite.
Entry level granite tends to be very uniform in colors and pattern and is often sold in thinner slabs of only about 3 8ths of an inch thick.
Low grade granite is typically less than inch thick and often requires a piece of plywood backing to provide additional strength.
In addition to durability thicker granite provides a higher quality and more substantial look than that of thinner granite.
Mid grade granite features clear.