This kit consists of diamond abrasives for smoothing natural and artificial stones and a sachet of polishing powder (useful only on marble). The product is formulated to manually restore the shine compromised by acids, scratches or other dullness. It is suitable for small interventions (max 2 m2). Even a single stain can be eliminated without necessarily having to act on the entire surface. Since it is equipped with medium to very fine grain abrasives, it allows the polishing of granites, quartzites and all siliceous stones (or stones with low carbonate content) and also green marbles (Verde Alpi, Verde Guatemala, India and similar) which are not homogeneously polishable with polishing powders for marble. Warnings: Stains absorbed deep into the stone, such as oil stains or colored stains, cannot be removed with this kit. Recommendations: in the event of an unsatisfactory result, it is advisable to repeat all the work again following the prescribed phases more scrupulously. Yields: the duration of diamond abrasives is conspicuous (several square metres). The Virginia TU kit is also known as the "Universal kit" because it allows you to polish the entire range of natural and artificial polishable stones.