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How do I determine the the hardness of marble?

All minerals have a certain hardness. The hardness of a mineral is determined by performing a scratch test. A scratch test is based on the Moh’s scale of hardness. A German scientist invented this scale by taking several known, pure minerals... Read More

We have Italian marble on the lobby floors in our commercial office buildings. Recently, we have noticed several problems: 1. Entire tiles are evenly discoloring yellow or grey and 2) Rust-like stains are appearing in an area near the door. What

The yellowing and graying of certain Italian and Greek white marbles is a common problem that I see all over the country. There are several possible causes for this condition: Maintenance technique-Take a close look at your maintenance program. Are... Read More

We just sealed our marble tile with a water-based sealer. There is now a light, rainbow-like film on the surface of the tile. I have used every cleaner I could purchase to try get it off, but it won’t budge. Any suggestions?

The sealer has left a hard silicone residue on the tile’s surface. To remove the excess silicone, the tile will have to be scrubbed with an abrasive cleaner. Several kitchen-type abrasive cleaners are available which will remove this film. If... Read More

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