GB/T 17670-1999

GB/T 17670-1999 establishes a unified coding system for natural stone materials, assigning unique identifiers to types of granite, marble, limestone, and other natural stones based on their origin, color, and texture. It is applied in the Chinese construction and stone industry for procurement, specification, and quality control, ensuring consistent naming and classification across architectural projects, interior design, and stone product manufacturing. This standard facilitates accurate communication between suppliers, engineers, and contractors when selecting or testing natural stone for building facades, flooring, or decorative elements.