Many homeowners are not familiar with natural stone and often lack knowledge about its quality standards. As a result, they tend to choose ceramic tiles for their home decor. However, the quality of natural stone is evaluated based on three main aspects: appearance, processing, and gloss. Understanding these criteria can help consumers make better choices when purchasing.
1. Examine Appearance Quality from Three Distances
The appearance quality of stone includes factors like edge damage, cracks, stains, color variations, pits, and warping. According to industry standards, superior-grade stone should have a consistent color tone and no visible defects. Experts recommend checking the surface from three distances: if a defect is visible at 1.5 meters, it’s considered defective. If it becomes noticeable at 1 meter, it’s seen as a minor issue. If it’s invisible even at 1 meter, it’s deemed acceptable.
2. Assess Processing Quality Using Three Ratios
The precision of stone cutting and finishing directly impacts its visual appeal and determines its grade. Key indicators include dimensional accuracy, flatness, and angle tolerance. Based on these measurements, stones are classified into top-tier, first-class, and standard products. Experts advise buyers to specify the desired quality level in their contracts rather than relying on vague terms like “meeting national standards.†For example, no more than 5% of top-tier stones should be first-class, and no more than 10% of first-class stones should be standard.
3. Check Gloss Level with Three Units
Gloss, or specular gloss, refers to how well a stone reflects light. The standard for polished granite requires a minimum gloss value of 75 units, with most high-quality stones ranging between 80 and 90. For marble, the minimum gloss for top-tier products varies depending on its chemical composition—ranging from 90 to 60 units. Consumers are encouraged to specify the desired gloss level in their purchase agreements to ensure they get exactly what they want.
The use of natural stone in home improvement has grown significantly. It now accounts for about 20% of the market, with high-end homes using it in up to 30%-40% of their interior spaces. From floors to countertops, stone has become a staple in modern design. Many companies are now focusing on customer experience, branding, and service to capture this growing market. By understanding quality standards, homeowners can make informed decisions and enjoy the beauty and durability of natural stone without compromise.
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