Evaluating standardized commodity natural stones from China requires mapping descriptive trade names to their official national catalog codes to ensure cost-transparent procurement. G655 granite, also known as Tong'an White or Rice Grain White, represents a widely specified Chinese light grey-white granite quarried in the Fujian province. Under the Chinese national standard cataloging system, the G-code prefix (where G stands for granite) identifies specific, catalogued quarry stones with high consistency and high production volumes. Mapping these commercial aliases allows B2B buyers to secure commodity-tier pricing without paying a premium for descriptive marketing labels.
Geological Origin, Visual Pattern, and Technical Specs
Geologically, G655 is a fine-grained, intrusive igneous silicate granite. Extracted from quarries in the Tong'an district of Fujian province, China, this stone has a mineral structure dominated by quartz and plagioclase feldspar. This composition creates a bright, clean, uniform white-to-light-grey background. Fine grey biotite mica and black hornblende crystals are distributed evenly throughout the matrix, creating the classic \"rice grain\" speckled pattern.
The primary visual characteristic of G655 is its high uniformity. Unlike gneissic granites that exhibit sweeping veins or irregular movement, G655 has a static, fine-grained texture. This grain structure ensures that slabs and tiles cut from different blocks remain consistent in shade and grain distribution. For large projects such as airport terminals, subway stations, or multi-family housing developments, this consistency is critical to achieving a uniform appearance across thousands of square meters.
From a technical perspective, G655 offers excellent durability. It features a water absorption rate typically below 0.35% (verify per lot), making it resistant to moisture penetration and staining. It has high compressive strength and a Mohs hardness of 6 to 7, resisting abrasion and scratching. Standard slab thicknesses are 20 mm and 30 mm, with half slabs measuring 2400 mm by 1200 mm (verify per lot) being common for high-volume tiling projects.
Commercial Advantages and Alias Mapping
Sourcing managers must understand the \"also known as\" mapping of G655 to avoid procurement errors. In the commercial stone market, G655 is traded under several descriptive aliases, including Tong'an White and Rice Grain White. Some distributors apply proprietary marketing names to G655 to suggest it is an exotic or exclusive stone. By renaming the material, they attempt to charge premium prices. Specifying the official national catalog code \"G655\" in B2B inquiries ensures that suppliers quote commodity-tier rates.
The G-code system provides transparency in the international stone trade. Standard codes like G603, G654, and G655 refer to standardized Chinese commodity granites with stable supply chains. For example, G603 is a light grey granite with a slightly coarser grain, G654 is a dark charcoal grey-black stone, and G655 is the brightest light grey-white variety. Sourcing managers can use these standardized codes to compare quotes from multiple factories in Fujian and Hubei provinces, ensuring competitive pricing.
The high consistency and massive quarry output of G655 make it highly suitable for large-scale commercial contracts. Slabs are processed into tiles for flooring, wall cladding, and exterior paving. The commodity pricing model and stable supply chain reduce project risk for developers and contractors. Sourcing directly from Fujian factories allows for strict quality control inspections at the processing yard before container loading.
Fabrication, Finishes, and Logistics
G655 granite accepts a variety of surface finishes. Polished finishes highlight the bright white background and grey speckles, making them suitable for interior wall panels and countertops. Honed finishes provide a smooth, low-sheen look that reduces glare. For exterior paving, public walkways, and steps, a flamed (thermal) finish is specified to create a slip-resistant texture. The thermal process causes the surface quartz crystals to expand and fracture, resulting in a rough, textured surface.
For cold-climate exterior projects, flamed G655 paving tiles must undergo freeze-thaw cycle verification under ASTM C666 or EN standards. The test confirms that the thermal shock of freezing water within the micro-pores will not cause spalling or cracking. Sourcing managers should request test reports from the exporter to verify physical stability. Slabs and tiles are packed in seaworthy wooden crates lined with polyethylene foam and secured with steel straps to prevent breakage during sea transit.
Export logistics are centered on Xiamen Port, the primary shipping hub for Fujian stone factories. Sourcing managers must plan container load weights to comply with destination port regulations. For US deliveries, containers are loaded to a maximum of 21 metric tons (46,000 lbs). This weight limit corresponds to approximately 70 to 80 slabs of 20 mm thickness. Planning slab and tile counts to maximize container weight capacity without exceeding legal road limits minimizes overall shipping costs.
| G-Code Identifier | Primary Trade Name | Color Tone | Grain Structure | Typical Sourcing Use |
|---|---|---|---|---|
| G655 Granite | Tong'an White (Rice Grain White) | Bright light grey-white | Fine-grained speckles | High-volume interior floor tiles and builder countertops |
| G603 Granite | Hubei Grey (Padang Light) | Light-to-medium grey | Medium-grained speckles | Exterior public paving, curbs, and large commercial stairs |
| G654 Granite | Padang Dark (Sesame Black) | Dark charcoal grey-black | Fine-to-medium grained | Heavy commercial wall cladding, steps, and borders |
Frequently Asked Questions
What does the code G655 represent?
The prefix 'G' stands for granite under the Chinese national stone catalog system, and the number '655' identifies a specific quarry zone in Fujian province. This system standardizes naming so buyers can verify the physical properties of the stone regardless of the commercial name used by distributors.
Can G655 granite be used for exterior applications in cold climates?
Yes, G655 has a low water absorption rate (typically below 0.35%), which prevents water from entering the stone and freezing. For exterior paving, a flamed or textured finish is specified to provide slip resistance, and the material should be tested for freeze-thaw durability.
What are the primary aliases of G655 granite?
G655 is widely traded under the names Tong'an White and Rice Grain White. Buyers should always ask for the G655 code to ensure they are sourcing the correct material at competitive commodity rates.
Fujian factories supply G655 in standard tiles and slabs; always request block-specific photos and check freeze-thaw testing certifications when specifying the flamed finish for cold-climate exterior paving.