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What happens when the mirror has a crack? Your reflection is effected, and you can see double yourself. The more cracks on the mirror mean there is no more reflection. That means that the light in the mirror goes in and comes out in many different ways, at many different angles. Bring this concept to a microscopic point of view and the same thing happens with the marble: When there are scratches on the surface, the reflection gets lost.

Natural stone can be classified into two general categories according to its composition: siliceous stone (such as granite) and calcareous stone (such as marble). Knowing the difference is critical when selecting cleaning products.

Siliceous stone is composed mainly of silica or quartz-like particles. It tends to be very durable and relatively easy to clean with mild acidic cleaning solutions. Types of siliceous stone include granite, slate, sandstone, quartzite, brownstone, and bluestone.


Calcareous stone is composed mainly of calcium carbonate. It is sensitive to acidic cleaning products and frequently requires different cleaning procedures than siliceous stone. Types of calcareous stone include marble, travertine, limestone, and onyx. What may work on siliceous.

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