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Yunrun Grey Marble

Yunrun Grey MarbleYunrun Grey Marble
Yunrun Grey Marble

Marble

China

About

Item Details

Material Type:
Marble
Origin:
China (Hezhou City, Guangxi)
Recommended Usage:
kitchen and bathroom countertop, wash basins, building stone, ornamental stone, stairs, interior, exterior wall and floor applications, mosaic, water-jet pattern, wall panels, table tops, balustrades, columns, wall and pool copings, pool pavers, sculptures, fireplaces, window sills
Additional Names:
Guangxi Grey Marble, Hezhou Grey Marble, Cloud Ravine Grey Marble, Ravine Gray Marble, Cloud Grey Marble, in China Stone Market:云涧灰(Yún Jiàn Huī), Yunrun Grey Marble
Finished Surface:
Polished,Bush Hammered,Tumbled,Brushed,Honed,Split,Machine Cut,Natural Surface,Sandblasted,Combed,Leathered,Water Jet,Chiseled,Pickling

Testing

Water Absorption:
0.25 - 0.40% by weight
Density:
2690 - 2730 kg/m³
Flexural Strength:
8 - 13 MPa
Compressive Strength:
80 - 120 MPa

Description

Yunrun Grey Marble is a natural marble quarried in Hezhou City, Guangxi, China. It features a cool, muted grey-green or sage-grey background with a high-gloss polished finish that enhances its subtle crystalline details. The restrained color palette and dramatic dark veining create a sophisticated, contemporary appearance suitable for elegant residential and commercial interiors.

Texture & Structure

The stone typically displays a fine- to medium-grained crystalline texture with subtle mineral speckles across the lighter upper areas. Its polished surface provides a smooth, reflective finish, highlighting the contrast between the subdued grey-green background and the darker mineral bands. Natural variations in color, crystallinity, and veining occur between slabs.

Pattern & Veining

The defining feature of Yunrun Grey Marble is a prominent, undulating band of deep charcoal-grey veining across the lower portion of the slab, resembling a distant mountain range or horizon line. The upper area is generally more subdued, with delicate crystalline speckles and soft tonal variations. This contrast creates a distinctive landscape-like composition, making the stone particularly suitable for feature walls and decorative applications.

Technical Characteristics

The following figures are provisional indicative estimates for database reference only, not verified laboratory results for Yunrun Grey Marble. Actual properties should be confirmed through testing of representative samples.

  • Water Absorption: Approximately 0.25–0.40% by weight
  • Bulk Density: Approximately 2690–2730 kg/m³
  • Flexural Strength: Approximately 8–13 MPa
  • Compressive Strength: Approximately 80–120 MPa
  • Mohs Hardness: Approximately 3–4
  • Porosity: Not established; laboratory testing required

Chemical Composition (% by Weight)

The actual chemical composition of Yunrun Grey Marble has not been verified. If the material is confirmed to be calcite- or dolomite-dominated marble, its composition may include the following constituents. These are broad reference ranges for carbonate marble, not measured values for this specific stone.

  • Calcium Oxide (CaO): Approximately 28–54%
  • Magnesium Oxide (MgO): Approximately 0–22%
  • Silicon Dioxide (SiO₂): Approximately 0.5–15%
  • Aluminum Oxide (Al₂O₃): Approximately 0–5%
  • Iron Oxide (Fe₂O₃): Approximately 0.1–5%
  • Loss on Ignition (LOI): Approximately 35–45%
  • Other Components: Minor amounts of potassium oxide, sodium oxide, manganese oxide, and trace elements.

These ranges are not a complete or internally validated chemical analysis and should not be presented as certified test data.

Mineral Composition (% by Weight)

The mineral composition requires petrographic examination or X-ray diffraction analysis. The following ranges are illustrative possibilities for carbonate marble and are not confirmed for Yunrun Grey Marble.

  • Calcite: Approximately 50–95%
  • Dolomite: Approximately 0–35%
  • Quartz: Approximately 0–10%
  • Chlorite and Other Silicate Minerals: Trace to approximately 10%
  • Clay and Iron-Bearing Minerals: Trace to approximately 5%

The charcoal-grey bands may reflect differences in mineral content or the concentration of accessory minerals, but their precise mineralogical origin has not been established.

Recommended Applications

Yunrun Grey Marble is suitable for interior wall cladding, decorative feature walls, hotel lobbies, reception areas, living-room accent walls, fireplace surrounds, bathroom vanities, and selected interior flooring applications. Its horizon-like dark veining is especially effective on large-format slabs, where the natural pattern can be displayed continuously. Bookmatching and carefully planned slab layouts can further emphasize the landscape-like effect.

Use in kitchen countertops, showers, outdoor installations, or heavy-traffic areas should be evaluated according to the stone's verified performance, finish, and installation conditions.

Usage & Maintenance

Clean the surface with a soft cloth or mop and a pH-neutral stone cleaner. Avoid vinegar, lemon juice, acidic bathroom products, and abrasive cleaning materials, as marble can be etched or scratched. Wipe spills promptly, especially oils and colored liquids.

A suitable penetrating sealer may help reduce staining, depending on the stone's porosity and intended application. Use compatible adhesives and grouts, and ensure proper substrate preparation and waterproofing in wet areas. For flooring, select a finish with suitable slip resistance, particularly where water is present. Regular inspection and appropriate professional maintenance will help preserve the polished appearance.

FAQ

Can the same Yunrun Grey Marble be used for both interior walls and exterior fa?ades?

Yes, Yunrun Grey Marble can typically be used for both interior walls and exterior fa?ades. However, its essential to consider several factors before proceeding: 1. **Durability**: Ensure that the marble can withstand exterior elements such as weather changes, moisture, and pollution. Some marbles are more porous and may require sealing or special treatments for exterior use. 2. **Finish**: The finish might differ between interior and exterior applications. For example, polished marble might be more suitable for interiors, while a honed or textured finish could be better for exteriors to avoid slipperiness and reduce the visibility of weathering. 3. **Climate**: Assess whether the local climate is suitable for marble, as extreme conditions can affect its longevity. Freezing temperatures, for example, can cause issues with expansion and contraction. 4. **Maintenance**: Consider the maintenance requirements for marble surfaces, especially exteriors, as they will be exposed to more dirt and potential staining agents. 5. **Aesthetic Consistency**: Make sure the marbles appearance aligns with both the interior design and the architectural style of the building. Before proceeding, consult with a professional architect or contractor to confirm that Yunrun Grey Marble is appropriate for your specific project requirements.

How should Yunrun Grey Marble be maintained in high-traffic commercial areas?

Maintaining Yunrun Grey Marble in high-traffic commercial areas requires a strategic approach to ensure its longevity and aesthetic appeal. Here are some steps to consider: 1. **Sealing**: Initially, apply a high-quality penetrating sealer specifically designed for marble. This will help protect the stone from stains and moisture. Resealing should be done periodically, typically every 6 to 12 months, depending on the traffic and specific products used. 2. **Regular Cleaning**: Clean the marble surface daily using a pH-neutral cleaner that is specifically formulated for natural stone. Avoid acidic or abrasive cleaners, which can etch or dull the surface over time. Use a soft mop or cloth and ensure that no residue is left behind. 3. **Spill Management**: Quickly clean up any spills to prevent staining. Use a soft, absorbent cloth and dab gently rather than wiping, which can spread the liquid. 4. **Dust Mopping**: Regular dust mopping with a non-treated mop will help remove abrasive dirt and debris that can scratch the surface. Do this at least once a day, or more frequently during busy periods. 5. **Polishing**: Consider polishing the marble to maintain its brilliance. This can be done professionally and should be based on the marbles condition and exposure to traffic. Periodically check for areas that might need more frequent attention. 6. **Mat Placement**: Place mats or rugs at entrances and near service areas to reduce the amount of dirt and moisture tracked onto the marble. Use non-slip and breathable backings to prevent trapping moisture beneath the mats. 7. **Scratch and Chip Management**: Inspect the marble regularly for any scratches or chips. Professional stone restoration services can repair significant damage, helping to maintain the marbles appearance over time. 8. **Educate Staff and Tenants**: Ensure that staff and any other users of the space are knowledgeable about the proper care procedures for marble. Misuse or neglect can quickly lead to damage. 9. **Furniture Protection**: Use floor protectors on the legs of furniture to prevent scratches and damage to the marble surface. 10. **Periodic Professional Maintenance**: Schedule regular professional maintenance checks, including deep cleaning and resealing as necessary, to extend the marbles life and maintain its appearance. Implementing these practices will help ensure that Yunrun Grey Marble remains a durable and attractive feature in high-traffic commercial areas.

Can Yunrun Grey Marble be used for furniture and decorative objects?

Yes, Yunrun Grey Marble can be used for furniture and decorative objects. This type of marble is prized for its elegant appearance, characterized by its grey tones and unique veining patterns. It can be used to create a wide range of furniture pieces, such as coffee tables, dining tables, and countertops, as well as decorative objects like vases, sculptures, and wall panels. Due to its visual appeal and durability, Yunrun Grey Marble is well-suited for both functional and ornamental applications in interior design. However, its important to note that marble is a natural stone, and as such, it requires proper care and maintenance to preserve its beauty over time.

Is Yunrun Grey Marble suitable for paving?

Yes, Yunrun Grey Marble is often suitable for paving. This type of marble is known for its elegant appearance and durability, which makes it a popular choice for both indoor and outdoor flooring applications, including paving. However, its important to consider a few factors when using marble for paving: 1. **Surface Finish**: Depending on the finish (polished, honed, or tumbled), the slip resistance can vary. For outdoor paving, a honed or tumbled finish is generally recommended to provide better traction. 2. **Weather Resistance**: While marble is durable, it can be affected by exposure to extreme weather conditions. Ensure that the specific type of Yunrun Grey Marble you choose is suitable for the local climate, as some marbles might be more porous or susceptible to staining and weathering. 3. **Installation**: Proper installation is crucial for longevity. Ensure that the base is well-prepared and that the marble is sealed to protect against moisture and staining. 4. **Maintenance**: Regular maintenance, including cleaning and resealing, will help preserve the marbles appearance and prevent damage over time. Always consult with a professional stonemason or installer to ensure the best results for your paving project.

Does a leathered or brushed finish Yunrun Grey Marble make natural stone stain-proof?

Neither a leathered nor a brushed finish on Yunrun Grey Marble makes the stone completely stain-proof. These finishes are primarily aesthetic treatments that affect the texture and appearance of the stone. A leathered finish gives the marble a soft, textured appearance that is less glossy than a polished finish, while a brushed finish offers a slightly more rugged texture. Stain resistance in natural stone is generally more about the porosity of the stone and the presence of a proper sealant. Marble, being a relatively porous material, can absorb liquids that might cause stains. To enhance stain resistance, it is important to apply a high-quality sealant to the marble surface regardless of the finish. Regular maintenance, including resealing as needed, will offer added protection against staining.

Why can water marks or dark patches appear on Yunrun Grey Marble after installation?

Water marks or dark patches on Yunrun Grey Marble after installation can occur due to several reasons: 1. **Porosity**: Marble is a natural stone that is porous in nature. If not properly sealed, it can absorb moisture or other liquids, leading to dark patches or water marks. 2. **Improper Sealing**: If the marble is not sealed properly during installation, it could be more susceptible to staining from water or other substances. Sealants help create a barrier to protect the stone from absorbing liquids. 3. **Humidity and Moisture**: High levels of humidity or direct exposure to water (e.g., in bathrooms or kitchens) can cause moisture to seep into the marble, leading to discoloration or water marks over time. 4. **Spills and Stains**: Spills from liquids like coffee, wine, or oils that are not immediately cleaned can penetrate the surface and cause staining or dark patches. 5. **Cleaning Products**: Using acidic or harsh cleaning products can etch the surface of the marble, leading to dull spots or changes in color. Only pH-neutral cleaners specifically designed for marble should be used. 6. **Installation Issues**: If the substrate or underlying surface was not appropriately prepared, or if there were issues with the adhesive used in installation, moisture could be trapped underneath the marble, leading to dark marks. 7. **Efflorescence**: This is a phenomenon where salts within the stone or substrate come to the surface when water evaporates, leaving a white or dark mark depending on the marbles inherent color. To prevent and address these issues, its essential to ensure proper sealing of the marble before and after installation, use appropriate cleaning products, promptly clean spills, and maintain a low-humidity environment in areas where marble is installed. If dark patches or water marks do appear, consulting a professional to clean and reseal the marble may be necessary.

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