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Grinding and polishing natural stone - detailed instructions

Diamond grinding and polishing disc for tiles when grinding tile edges with the angle grinder

Grinding and polishing natural stone - Instructions, tools and machines required.

Difficulty: Medium | Costs for 1m²: approx. 20-40 euros | Workload for 1m²: approx. 1.5 hours

We will show you how to prepare the natural stone by grinding and polishing and how you are guaranteed to enjoy it again.

Natural stone tiles old vs new in comparison

Amazing results are possible with simple tools and application methods.

1. Can you grind natural stone yourself ?

Yes, that is possible.

But it's important to use the right tools and techniques.

craftsmen drop by to grind and polish natural stone

Our tip: Grinding and polishing natural stone is not difficult. But you have to be able to implement the various application steps piece by piece. Therefore, inform yourself as best as possible on this topic.

2. Which tools are suitable for grinding natural stone?

Photographed tools for grinding natural stone

Before you start sanding, you need the right tools and machines.

What tools and machines are required?

  1. an angle grinder (any brand)

  2. Dust mask and goggles

  3. Diamond grinding pad and diamond polishing discs

Our experience: Diamond grinding pads are the only tool with which you can bring your natural stone surface back into shape as efficiently and cleanly as possible without using large machines.

Diamond grinding pads mounted on an angle grinder

In addition, water may be required for individual steps. The water can ensure a significantly better grinding and polishing result .

Diamond grinding pads are available for dry or wet grinding.

Master tiler grinding and polishing a natural stone tile with the angle grinder (flex)

2.1 That's why it's better to chemically clean large natural stone surfaces than to grind them.

Natural stone renovation before after

Grinding natural stone is often but not always the best choice.

In the case of large-scale stone renovations from a total area of ​​5 sqm, consideration should be given to treating them with a selected chemical agent.

According to Stein-Doktor.com, natural stone renovation with a pH-neutral chemical cleaning agent is the best choice for private individuals .

3. Grinding natural stone - It depends on the grit.

When grinding natural stone, the grit of the abrasive is of crucial importance. The lower the grit, the coarser the abrasive and the more material is removed.

If you want to remove deep scratches or chips on the tile, you should start with a coarse grit.

Grind out scratches in the natural stone tile

3.1 Grits of diamond grinding pads and their behavior when grinding natural stone

Grinding natural stone Grain sizes in the overview of the diamond grinding wheel

  1. A 50 to 100 grit is ideal for removing deep scratches or damage. However, if you just want to restore the natural stone's shine, you should start with a higher grit.

  2. A 200 to 400 grit is ideal for smoothing the natural stone and enhancing the shine.

  3. To polish the natural stone, you will need diamond wheels with a grit of 800 or higher.

The table below is the result of collaboration with various craftsmen.

3.2 Table for selecting the right grit according to the desired work step

Grit diamond grinding pad (polishing wheel)

scope of application
50 grit Cleaning and renovation sanding

100 grit

Extended cleaning and renovation sanding
200 grit Basic cut (without scratches)
400 grit Preparation polish
800 grit polish
1500 grit Preparation high gloss polish
3000 grit Mirror Polish Enhanced

3.3 More advice on grinding stones

4. Grind and refresh natural stone edges

When refreshing your natural stone, you should not only make the surface shine again, but also look out for possible damage in the edge area. Experience has shown that this area of ​​the natural stone has experienced the greatest stress over time.

The most common edge damage that can be repaired:

  • chipping
  • flaking
  • Dents of all kinds

Damaged edge of a natural stone step

Our tip: Practice even circular movements for the best results.

5. Step-by-step instructions for sanding natural stone edges

  1. Preparation:

    It is best to start by cleaning the edges. Remove any dust and dirt with a wet cloth or brush. Please make sure to let the edges dry before you start sanding:

    Clean natural stone before grinding

    2. Sanding edges:

    Use a 50 or 100 grit diamond grinding wheel to sand down the edges.

    Guide the sanding disc along the edge with even pressure. Please don't stay in one place for too long.

    The tool could overheat and wear away the material too quickly or even leave burn marks. Sand until all edges are clean and smooth.

    3. Polishing natural stone edges:

    For polishing edges, it is best to use a diamond polishing wheel with a high grit (see table above). Start with a 200 grit and work your way up to a higher grit like 400 or 800 grit.

    A polishing agent can help you to protect your surface and to work it much better. It also provides an incomparable shine.

    4. Graduation:

    After polishing, you can clean the natural stone edges again to remove any residue of the polishing compound. Check the edges for bumps or uneven spots and sand down if necessary.

Advice on sanding and deburring banner tiles

6. Conclusion - Grinding and polishing natural stone is no problem with the right tools!

Grinding or polishing natural stone is by no means overly difficult or strenuous, but it does require a willingness to devote several hours to the task.

7. The most frequently asked questions about stone grinding and polishing?

Diamond grinding wheel for natural stone banner image

1. Can I grind and polish any type of natural stone?

Yes, most types of natural stone can be cut and polished. However, the methods and tools you should use vary depending on the type of stone.

2. What do I do if I have deep cracks or breaks in my natural stone?

For deep cracks or breaks, you should consult a professional. The stone may need to be replaced or professionally repaired.

3. Why should I use water for grinding and polishing?

Water helps reduce the dust created during sanding. It can also help create a more even finish and extend the life of your sanding pad . Please note that the sanding pad must also be suitable for wet use.

4. Can I grind and polish the natural stone without a diamond wheel?

Using a diamond grinding wheel is recommended as it is more efficient and produces better results. However, other methods such as grinding with sandpaper can also be used. However, the results should not be comparable to those of a diamond grinding wheel.
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    Jürgen Kleis

    "With my many years of experience in the tool industry, I can give you helpful tips and tricks for DIY and handicrafts".

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