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Stone Myths By Frederick M. Hueston www.stoneforensics.com Over the past 20years I have heard many stories about the reasons stone will fail, turn color, fade or what ever. Many of these stories are funny and almost all of them are just plain... Read More

Q. I just had granite countertops installed and after they left noticed what appears to be a crack running diagonally the full length and edge. you can see and feel it yet it is not so open as to see light. the contractor says it is a vein. how can... Read More

There are two possible reasons the veins in your marble are changing color. First, white marble characteristically contains iron; it is possible the iron is oxidizing and turning to rust. If this is the case, it may be impossible to remove. Second,... Read More

Black marble, especially Negro marquina, is very susceptible to spalling. Spalling is a condition in which the stone flakes off and falls apart. Several factors can cause spalling: excess moisture, choice of setting material and method, the polishing... Read More

I am assuming that the black marble you are referring to is negro marquina. If this is the case you will find that this type of black marble is very susceptible to spalling of the veins. Over-polishing with either powder polishes or recrystallization... Read More

The material you are describing is probably a marble known as rossa perlinio. This type of marble, when it is formed has mud running through it and this is what the soft veins are---mud. Unfortunately the only cure is to fill the veins as the erode... Read More

This is a common problem with black marbles. How often are you using the recrystallization process? I have seen this problem when recrystallization is over applied and performed too often. At this point the floor may need to be re-honed. An... Read More

No, it is not true. Many marbles do have veins, but there are some that appear to have no veins at all. On the other hand many granites have no veins but there are also those that do have veins. Determining if a stone is marble or granite should not... Read More

Q. How do I protect and maintain my calcutta gold stone? A. I am going to recommend that you read our Stone and Tile Care Guide. It is a comprehensive guide that you will want to read and keep on hand. It covers everything from routine cleaning to... Read More

Q. I have just had a large granite countertop installation done, including two large pieces of verde fuoco, which are riddled with fissures as well as several cracks, some but not all of which appear to have started out as fissures. I want to replace... Read More