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Q. Someone spilled white wine on my onyx table last night. I wiped it up, but this morning I see that it looks like it penetrated the table and left a dull finish over an area about 15 inches wide. Any suggestions what to do? I have a feeling time... Read More

It sounds as though your slate floor has a rough finish which catches the fibers of the mop as it is dragged across the floor. First, you need to deep-clean the floor to remove all dirt and grime. Next, apply a good-quality acrylic sealer. Several... Read More

Q. Can you please provide some definition of Sealer for Stone?A. Excellent question! For starters, when referring to stone, the word sealer is wrong. Well, technically it is not, but the reason that it is wrong is because sealers for stone are... Read More

Q. How do I restore my polished marble? It has become very dull. A. Marble is a relatively soft stone. A accumulation of scratches over time can dull the polish. Etching, the whitish marks left on a stone's surface after an acidic substance has... Read More

The green growth you see is probably algae. Algae usually grows were there is abundant moisture. My guess would be that the tile stays wet after a rainstorm, allowing the algae to grow. To clean it, prepare a solution of bleach and water; about one... Read More

Diamonds and bricks both work well on granite but the final results will depend on the skill of the operator. Generally bricks require the use of an Italian grinding machine and a much higher degree of skill than diamonds. Diamonds are much easier to... Read More

Unfortunately there is no formula for how long each grit should be worked except that granite requires much longer to hone then marble. Generally one minute per square foot is a good starting point. However, some granites may take longer. It is not... Read More

The use of a pressure washer on marble should be avoided. Pressure washing forces water into the pores of the stone and can cause the development of efflorescence. If you must use a pressure washer make sure that the operator is skilled. Do not use a... 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

Q. What are those white dots on my white marble?   A. This article, by Frederick M. Hueston, Stone Forensics, provides the answer.Have you ever wondered what those white dots are on white marble? You sometimes see thousands of them in high... Read More