When laser engraving stones, you will inevitably produce a considerable amount of dust. This can stick to your material and cause damage, depending on the type of stones you are using. Always ensure that you check your nozzle prior to each engraving job - you can even check the nozzle during an engraving job if it's a long one. The nozzle can become clogged with dust and block the laser path, so by wiping it with a cloth or rinsing it under clean water, you can quickly and easily restore the laser to its optimal performance. The functionality of the lens and mirror should also be checked when laser engraving stone.
If you intend on removing the natural dust layer from your chosen stone, we suggest cleaning it before you begin laser engraving. If you rinse the stone in water after the engraving process, you may wash out a part of the engraving, potentially ruining your design.