GRANITE COUNTERTOPS VARY IN GRADING

　　Granite is an extremely durable natural stone -- the only harder stone is the diamond -- and makes a stylish and value-enhancing addition to any home. Granite countertops are installed as polished slabs, custom cut to fit a particular kitchen countertop layout. Before investing in a granite countertop, it's important to understand the three tiers granite is graded into, according to its source, quality and the appearance of the stone.

Granite

　　Determining Factors in Grading

　　The grade or tier that a granite slab is given is determined by its thickness, colors, veins, marking and pitting, the country where it was quarried, and the amount of soft minerals it contains. Homeowners buying a granite slab for a countertop pay one price that includes the cost of the raw slab, measurement, pre-cutting and installation.

　　Low-Grade 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 usually of a thinner cut, such as 3/8 inch. Its colors are not unusual, and it often requires a piece of plywood backing for additional strength. Imported from China, lower-grade granite costs from $40 to $60 per square foot, at publication.

　　Mid-Grade Granite

　　Mid-grade granite is imported from India or Brazil and generally costs $55 to $70 per square foot, at time of publication. Of average thickness, 3/4-inch, granite in the mid-tier range can sometimes be harder and more durable than the more expensive high-grade. It is graded as middle tier due to having average -- not scarce or unusual -- colors and patterns, and problems such as a surface that is pitted.

　　High-Grade Granite


　　High-grade or top-tier granite is considered to be of the finest quality, due to the rarity of its appearance and its source. At time of publication, top-tier granite was selling for $60 to $100 per square foot. Generally sourced from places in India or Brazil, it has at least an average thickness of 3/4 inch or more. Top-tier graded granite has uncommon or colors, veins and patterns and/or noticeable amounts of hard or soft minerals.