Hardest Non Porous White-Grey Quartzites?
NewEnglandgal
4 years ago
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suzyq53
4 years agoUser
4 years agoRelated Discussions
Is quartzite really, really porous...or not?
Comments (43)Without a doubt all this stone classification is confusing to consumers.We work on stone everyday and it would be impossible for us to know the names and characteristics of every surface we worked on. To keep things simple we can id most stones by their grainy or veiny look. Granites being grainy and marbles being veiny. However with so many types of stones being used today that doesnt always work so we use the lemon test which tells us if a stone has calcites and will etch and just how porous it is. We check as best we can for signs of resining . Checking the edge of a slab for drip marks and also checking the surface. If the surface looks like glass with no natural pitting inherrent in most granites or igneous stone there may be the possibility of a resined slab. I dont think a resined slab is a bad thing for consumers but if your a stone refinisher and you service(top polish) a resin slab by taking out a scratch or damage you may not be able to match the factory finish properly. I think consumers should think the same way and not be to concerned regarding names and classifications. They should be informed and educated to do the proper testing of the stone they want to purchase. A large investment of a product you will be putting into the busiest parts of your home. Kitchens,bathrooms and family rooms are where most spills and acidic products are used. Purchasing porous stones can be solved by sealing to a certain extent. Make sure you know how porous the surface is before you commit to the purchase.Its an easy test just puddle up some palm sized puddles of water and let them sit on one or two areas for 10-15 minutes and then wipe away. If you see a darker mark then you know the stone is absorbing the water that stone will require sealing. I am in homes and businesses everyday and we dont see that much true staining,stains that are darker than the stones surface. We do see alot of staining that is lighter than the stones surface which is always etching. This occurs on stones such as marble,limestones,travertines and any stone that contains calcites. It would be wise to see just how much sealer a porous stone will require to be really sealed. I believe some stones are so porous that sealing them could be classified technically impossible. The definition of a impregnating sealer is a product that temporarily inhibits the intrusion of staining agents. Yes there are better sealers coming on the market but most are just marketing at its best or worst. Use well known brands and dont trust everything you hear. Anytime you hear someone tell you a product is just like granite please test for your self. It doesnt matter what they call it only how it will perform in your home. Most important make sure you are working closely with the fabricator. Make sure they are credible and have lots of references and history. Make sure they want you to be as educated about the purchase you are going to make as can be. Test-Test -Test. Shopping for stone surfaces can be tedious...See MoreStripping and Sealing a Quartzite Countertop (White Macauba)
Comments (30)My fabricator said he sealed my new Roma Imperial quartzite island, but water would soak into it quickly and leave a dark mark that would disappear after several hours. I used acetone to strip any previous sealer used and remove a few oil stains from one night of cooking, then applied Miracle Sealants 511 Porous Plus 5 or 6 times, waiting a few hours between each. Essentially kept applying until it quit soaking in/changing the color of the surface. I wiped up excess from the last coat pretty quickly but there was still a film that felt grainy when running your hand across the surface, so I took an electric buffer after it - one typically used for car detailing work - for a few hours (big island) using two different pads, then rubbed it down again with a soft cloth. That removed the "grainy" residue and now the surface is shiny and squeaks when you rub your fingers over it. There was one small etched spot that happened before I applied the sealer, and though it's still visible, the sealer filled it so it feels smooth to the touch like the rest of the surface - no longer rough and pitted. I poured water on the surface and it beaded up so I let it sit overnight. The next morning the water had completely evaporated and there was no mark whatsoever. We'll see how it stands up over time but I'm feeling pretty good about it....See MoreWhite Macaubas quartzite or Cambria Ella quartz?
Comments (20)I am a fabricator. The various quartz slab manufacturers have spent a lot of effort trying to make white colors that mimic stone like Carerra marble and some of the quartzites. In the case of the marbles there is a substantial advantage in the material properties (scratch resistance, stain resistance, resistance to etching) for the quartz products vs. the marble which compensates somewhat for the fact that the beauty of the marble is still unmatched. The quartzites, however, are extremely durable and IMHO still have a substantial advantage in appearance particularly if you take the time to select your particular slab(s). There is a tool in the stone industry called a gloss meter. It measures the "depth of the shine" for polished materials. The quartz products will measure in the low 40's while most polished natural stones will be mid 50's or higher. To the consumer this difference is best described by the comment that the natural stone looks "wetter". If you want a polished look the natural stone will be better, This difference is obvious when you put a sample of like colors of quartz and natural stone side by side. my 2 cents....See More50 Shades of Quartzite (AKA, is quartzite porous?)
Comments (24)"The natural stone industry pays her to shill for them...Karin needs to tell her Brazilian overlords that she's out of scientific and technical lipstick to put on their impoted pigs...Karin, I challenge you to put your geologist brain to work coming up with a solution to the pervasive problems inherent in the quartzite aspect of the natural stone industry" The irony is that in this very thread, Karin has written at length about quartzite and its properties, and has written numerous other posts about testing quartzites and what to watch out for. Apparently @joseph_corlett wants Karin Kirk to solve all the problems of the stone industry. @joseph_corlett's comments above about Karin Kirk are despicable even for him who frequently tosses out supercilious comments on this forum. @joseph_corlett - provide backup that Karin, as you put it, has "Brazilian overlords". Provide backup for your statement that "The natural stone industry pays her to shill for them". You are one to frequently talk of lawsuits on this forum. Yet here you are, fervently making libelous statements about Karin. If Karin did not respond to the recent comments by @Lindsey Brady and @jmh0405, it could be because they have not actually tagged her, so how is she supposed to know she is being asked a question. Her tag is @karin_mt. Though with what Joseph Corlett wrote about her, I wouldn't blame her for not coming back to this forum. Karin Kirk has a website with her contact info if you want to look her up. BTW, Karin holds a bachelors in geology from Skidmore College and a masters in Earth Sciences from Montana State University. She has taught courses about climate change, ran energy conservation projects, worked on national-scale climate education efforts, and worked with NOAA on its Climate.gov website. She also has a TED Talk on climate change if you are interested. (There are about 100,000 people that apply to give a TED Talk every year. 100 get selected.)...See Morecpartist
4 years agoUser
4 years agoNewEnglandgal
4 years agolast modified: 4 years agoNewEnglandgal
4 years agosuzyq53
4 years agoUser
4 years agosuzyq53
4 years agoNewEnglandgal
4 years agoUser
4 years agoJAN MOYER
4 years agolast modified: 4 years agoNewEnglandgal
4 years agocpartist
4 years agosuzyq53
4 years agoAJCN
4 years agoD. Slade
4 years agoNewEnglandgal
4 years agoNewEnglandgal
4 years agoNewEnglandgal
4 years agoTracy Hogue
3 years agolast modified: 3 years agoNewEnglandgal
3 years ago
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