Granite[2]

Updated: 2026-09-20

Overview

Granite is a coarse-grained, intrusive igneous rock composed mainly of quartz, feldspar, and mica. It forms from the slow crystallization of magma beneath the Earth's surface, resulting in its characteristic granular texture. Due to its hardness and durability, granite has been used for centuries in construction and decorative applications. Granite's aesthetic appeal, combined with its resistance to scratches and heat, makes it a popular choice for kitchen countertops, flooring, and monumental structures. Its natural variations in color and pattern ensure each piece is unique, adding to its desirability in high-end architectural projects.

Physical and Chemical Properties

Granite is known for its high compressive strength, typically ranging between 100–250 MPa, making it one of the most durable natural stones. Its hardness on the Mohs scale is around 6–7, which contributes to its resistance to abrasion and wear. The rock's low porosity (usually less than 1%) enhances its resistance to staining when properly sealed. Chemically, granite is primarily composed of silica (70–77%), alumina (11–14%), and smaller amounts of potassium oxide, sodium oxide, and other oxides. This composition gives granite its resistance to acidic and alkaline substances, though prolonged exposure to harsh chemicals can still cause surface damage.

Main Applications

Granite is extensively used in the construction industry for building facades, flooring, and paving due to its strength and weather resistance. Its polished surface and aesthetic appeal make it a preferred material for countertops, vanity tops, and other interior design elements. Beyond construction, granite is also used for monuments, tombstones, and sculptures, where its durability ensures longevity. In recent years, engineered granite products, such as tiles and slabs, have gained popularity for their uniformity and ease of installation.

Safety and Storage

When working with granite, proper safety measures are essential. Cutting or grinding granite generates silica dust, which can cause silicosis if inhaled. Workers should use respirators, wet-cutting methods, and proper ventilation to minimize exposure. Granite slabs should be stored horizontally on flat, stable surfaces to prevent cracking or warping. They should be kept in a dry environment to avoid moisture absorption, which can lead to discoloration or structural weakening over time.

B2B Procurement Guide

When procuring granite for commercial projects, consider factors such as color consistency, thickness tolerance, and surface finish. Verify the quarry source to ensure ethical and sustainable extraction practices. Request material certifications, such as ASTM or EN standards, to guarantee quality. Prices vary based on origin, rarity, and processing. For reference, premium granite slabs can cost $100–$200 per square meter, while standard grades may range from $50–$100. Bulk purchases often qualify for discounts, and long-term contracts can stabilize pricing.