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Knowing Your Stone: Siliceous vs Calcareous

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Cleaning marble or calcareous natural stones

 

Siliceous and Calcareous Stones


Avoid causing damage to popular natural stones such as marble, travertine and limestone by understanding key differences between a siliceous and calcareous stone.

Siliceous Stone

Common types of siliceous stone include: granite, slate, sandstone, quartzite, brownstone, and bluestone. A siliceous stone is composed mainly of silica or quartz-like particles, and are considered durable and easy to clean. Unlike a calcareous stone.

For siliceous stones, messes such as hard water stains and mineral deposits are easier to clean, since it is safe to use "mild" acidic cleaning solutions on an occasional and infrequent basis. Although harsh products should still be avoided, products such as the Supreme Surface Scum & Mineral Deposit Remover may be used.

Calcareous Stone

Common types of calcareous stones include: marble, travertine, limestone, and onyx. Calcareous stones are composed mainly of calcium carbonate, which is sensitive to acidic or alkaline-containing substances.  As a result, these stones require various types of cleaning methods for various types of messes, particularly for messes such as hard water stains and mineral deposits.

For calcareous stones, acidic cleaners or products such as vinegar and lemon juice should be avoided.  Additionally, formulas designed for removing calcium should be avoided, meaning the Scum & Mineral Remover should not be used.  In these cases, protective or preventative formulas are recommended.  For this case, ioSeal can be greatly beneficial.

Helpful Links For Stone Care and Maintenance:

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  • Tom Munro
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