Stone and Marble Stone Inspection


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Some Practices to Check Quality of Marble On Site

1. Check all pieces for uniformity in colour, size and quality as specified.

2. One face of the marble should be polished and all four sides machine cut. The polishing quality and cutting quality.

3. It should be straight and uniform in thickness. Remeber the thickness of marble should be checked for each pieces.

4. Along with front surface, also check the back side of the marble slab. To check back surface wire mesh quality.

5. On examining the marble’s surface under light at an angle of 45 degrees, if you find any dull surfaces and patches, then it indicates poor quality. These dull areas are due to cracks filled with the chips. This type of marble cannot be used for heavy traffic area.

6. Veins on the surface of marble should always be checked. While buying, flip the stone over and check for cracks or fissures. Sometimes small cracks are located along with the veins on the marble surface. Slabs with small cracks can be used in low traffic area. If wide cracks are there, then it is not good- quality marble.

7. Also you can check if artificial colours are added to marble by scratching its surface. If it resists scratches, then the marble is artificial and colour can fade after installation.

Stone and Marble Stone Inspection

Stone defect- crack stone production machine

stone color consistency checkstone color consistency inspection

Best Practices to check quality of marble

We inspect slab orders piece by piece at the end of production before packing. We pay close attention to the following points during the slab inspection:

Selection of color

Polishing quality

Cracks , repairing quality on surface

Slab measurement

Epoxy quality (in order to prevent color changing)

Epoxy and net application quality

Bundle/packing quality

We can inspect at every stage throughout production:

  • Factory Evaluations
  • Pre-Production Inspections
  • During Production Inspections
  • Final Random Inspections
  • Container Loading Supervision

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Why you need inspection for the importing stone?

Controls prior to delivery of stone

The heterogeneity of natural stone is sometimes matters of dispute between the contractor and the supplier as the expected look is not obtained once the work is complete. This is because the natural stone usually has variations of colour, texture, marbled, etc., associated with its natural origin and, moreover, need not constitute grounds for rejection.

In fact, many designers look to enhance the aesthetic value of the pavement from the variations in appearance. In general, it could be said that the variations in appearance along with a sufficiently harmonious laying can be a tool of architectural design, rather than a cause of rejection. Therefore it is necessary that, before delivery of the material, the manufacturer provides a reference sample consisting of at least four pieces and covering an area of at least 0,36 m2. The said sample must represent the extreme and average aspects of the material and must be accepted by agreement between the supplier, the project management and property owner. The criteria for acceptance or rejection of certain defects must be defined contractually between the manufacturer and the client before the start of supply. In general, following defects could be considered as grounds for rejection: broken pieces, pieces with cracks on some surface, pieces with breakage in the corner and breakage or chipping of the edges.