This best experience that I've had while shopping for granite! I've been to a ton of granite suppliers over the past two months and not one of them have provided the service and knowledge that Cornerstone provided. Kevin and Amanda will make you not want to go anywhere else. They went above and beyond my expectations and I'm happy to support their business. read more

Kevin was really accommodating and helped us with our quartzite slabs. We bought 4 polaris quartzite slabs from him. We loved our quartzite slabs. It was affordable and beautiful! read more

Cornerstone Marble & Granite - Polaris quartzite - Home Decor Near Me - Hayward, California

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I went there to buy a granite slab, was told 1000$ for it, when came to pick it up Kevin said 1400$. Of course I asked why the price is different this time and Kevin explained. First thing he told me I am a cheap sh.t, than that I am a motherf....r and a b..ch. At the end stated that I discriminated him as Asian. So AVOID this place and that guy, plenty of other companies around. Cornerstone is a company ran by Kevin who seems to have some personal problems, plus he lives in that warehouse. read more

Their website is completely misleading. They promote multiple slabs on their website for low prices. It says Originally $1,625 and now $20 -Slab Size: 122" x 72" Yet what they send you in the mail is a tiny sample. Nowhere on their site do they say samples and why would a sample be originally $1,625? Yes obviously $20 is a low price for a slab but his pictures show a lot of them so it looked like maybe they were clearing out old stock and offering sales. There were multiple listings like this. When questioned he immediately changed his website to say samples and claims they have always said samples. I took screenshots of all my purchases and the original listings for proof to show nowhere said samples. This business is dishonest and promoting scams for sales. They have been reported to California weights and measures and the BBB. read more

If I could give zero stars I would. I experienced the worst form of customer service in my life with this company. The owner Kevin was completely unprofessional and I highly recommend people avoid purchasing anything from this company. I purchased a slab of granite called Imperial Gold in June. Kevin allow me to leave the slab there until my bathroom project began. I called and spoke to Kevin in August advising that I would need an additional slab of Imperial Gold because I would wanted to put the same granite in another part of my bathroom. I purchased the additional slab over the phone. I called a few weeks later to schedule the delivery of both slabs. I was told that they only had a flat bed to deliver it because their delivery truck was stolen and I would need at least three people to help with removing the slabs from the truck because his delivery guys don't remove items off the truck. I have never heard of such a thing! Once the slabs were delivered, my husband noticed the granite chipped in several corners of each slab. I called Kevin about that and he acted like it wasn't a big deal but said he would send me a check for $75.00. Once I got home from work and looked at the slabs I realized that was not the slabs I purchased. They were a completely different color. I called Kevin and he said that he decided to send me those two slabs because he had two of them. The slab I originally chose he only had one and couldn't order any more. I told him that what he sent me wont work with my color scheme. He tells me the "Imperial Gold" comes in different shades and the one he sent me is just a darker shade. Take a look at my pictures. Imperial Gold #1 is what I originally purchased and Imperial Gold #2 is what he sent me. He told me I could come back to his store and choose something else if I wanted. At this point I'm in the middle of my project, I have to get something fast. So I go to his store and I find nothing I want after an hour of looking. I come across two slabs that look decent, he told me those are quartz. I tell him, I like those are you willing to switch out the granite for the quartz. At first he says no because quart is more expensive. I tell him I don't see anything else I like and for the inconvenience I have experienced, you deciding on your own to send me granite that looks nothing like what I originally purchased will you make an exception. After a lot of back and forth, he send me home with three samples to show my husband, one of which is the quartz. He said if your husband likes the quartz he will switch it out. I call him the next day and tell him my husband likes the quartz will he switch it out he says yes. My husband and I make a second trip out to his business to look at it in person together and talk to Kevin and he agrees but says his second truck is broken and he can't come pick up his granite that is in my house or deliver the quartz but if we can bring it he will reimburse me the $120.00 delivery fee he charged me. So I rent a uhaul truck, and get some family to help out with the delivery of his granite and pick up of my quartz. The next day we show up at the business, Kevin is not there but his employee Ning and the guy that delivered the granite was there. Ning comes to me with a paper explaining that her boss Kevin told her to give me this. It was written out about the exchange and that because the quartz is more expensive than the granite I would need to pay $200 more dollars. I told her Kevin and I never discussed paying any additional monies for the quartz this is suppose to be just a switch out. She tries to explain to me about how much more quartz cost and I told her either we switch out and you give me my $120.00 for the delivery fee or give me back all my money and you keep your products. She says ok, walks back inside the business. The guy helps my family take off the granite and put the quartz on the truck. After they are done, I go back in the office and she has me sign a piece a paper about the switch out and that no money is due for the switch. I said ok, now where is the check for the delivery fee. She says she wasn't told anything about a check. I have to call her boss for that. I call Kevin and now he is saying that he figured since he is giving me the quartz which is more expensive than the granite that I would just call us even and not take the delivery fee from him. That he is feeling like I'm "taking advantage" of him. I told him this is not what we discussed and not what we agreed to. After arguing back and forth for about 20 minutes, I hang up, I tell my family to take the quartz off the truck. As they start, Kevin drives up and aggressively asks me, "why is his quartz on the truck, that's stealing!" I told him, your employee helped to put it on the truck! He eventually gives me my $120.00 back after he see my family with me, all of a sudden he gets nervous and changes his tone but it was such a horrible experience. Buyer Beware!!! read more

Cornerstone Marble & Granite - Original Purchase - Home Decor Near Me - Hayward, California

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The product and service delivered is not what we expected. - Deliberate cheating On July 9th, we paid for slabs at Cornerstone. They showed us their previous projects, and we were impressed by the beautiful look. - Stain in slabs We paid the deposit for the slabs. They promised the stain would not be there. They convinced us that it would be a beautiful looking finish. But it turns out the stain is still in the slab - Different colors and texture Cornerstone also promised to provide slabs of the same for our 2nd kitchen's countertop and island top. However the slabs for our 2nd kitchen have very different color and texture patterns after finish. Such difference in the same kitchen is not what they promised. - bad quality of finish There are fractures in the slab, the finished surface is not smooth, the sink top are cut from two different slabs with drastic color difference, the backsplash also uses different pieces to cause an ugly look. What they promised a nice and wonderful look turned out to an ugly mosaic. They cheated us to show their previous work with a stolen picture from other website(see above . Their final delivered product and service are nowhere near their promise and originally agreed standard. Overall, we think Cornerstone deliberately cheated on us, made intentional false promise, did not deliver what we agreed, and did not meet the minimal of being a honest busine. Such unethical and illegal sales activities had a horrible impact on our life. It delayed our new construction project and caused substantial monetary damage to us. read more

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Good selection, great prices on pre-fabs and slabs for do it yourselfer's or getting it for your contractor. read more

Like someone said, I wish I could give them ZERO star if possible. Kevin, who acquired this business free from his parents, offers worst possible customer service. His "what do you want" attitude and "I am too busy" way of addressing questions makes you leave the place immediately. He offered a price that he claims is the lowest. I left without buying and went to Uni Tile and Marble. Uni Tile was hustling and bustling with customers unlike Cornerstone. For 40% less, I saw a lot more selections. I found the slabs I was looking for. All the bull Kevin was giving about what's available in the market and what's not is UNTRUE. read more

I sent Kevin measurements and photos of my small kitchen counters so he could give me estimate for granite. I talked to kevin on the phone to go over the estimate and at that time he said he thought it would take 2 slabs even though the estimate called for only 1 slab. Because the slab cost was only $220 I thought ok another $220 (not a big deal). My husband and I drive over 1 hr in bumper to bumper traffic to go to Hayward to pick out the slab and place our order. When we get there my husband looks at the slab and tells me it is not WIDE enough for our counter. Kevin was not there even though we called in advance to say we were coming. The lady who was there alone also said we would need to buy a much larger and more expensive slab (but it didn't match the $220 slab). We waited almost 1 hr for Kevin and then left. After we left Kevin called and he said the lady did the estimate and she didn't know we would need a bigger slab. I told the lady before i left I felt that they were doing a bait and switch and I was upset because I drove far to place an order only to find out the estimate was about 50% of what the real cost would be. I'm going to Home Depot tomorrow. read more

I picked up my marble countertop for my bathroom and my granite for the kitchen was sourced from here. I really enjoyed my entire purchase experience here. Scott was friendly and very helpful. He actually cared about ensuring our selection process. read more

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I share the same feeling of many recent reviewers: very disappointed with its product and service. First they were not honest. They showed us some beautiful pictures of "their" past projects which actually were copied from public website. We found out from realizing the same picture showed up first in Google search results. They promised the slabs to be of the same stone. But the two slabs are of different shade and texture. They put them together with rough cutting and finish to make the counter top look more like a mosaic. They stopped taking our calls and refused to correct their wrongs. We had to go through credit card dispute process to hopefully recover the loss partially. The whole granite kitchen work had to redo again. It has been a total nightmare for me. I would recommend you to stay away from this company! read more

Cornerstone Marble & Granite - Home Decor Near Me - Hayward, California

Don't bother wasting your time here. All the 1 star reviews are pretty accurate with respect to Kevin's poor attitude and misleading/bait-and-switch techniques. I texted Kevin after seeing an ad in CL that had a slab design I wanted and included a picture of the ad and slab that I was interested in. He said he had a lot of the slab available. Since this design/coloring/pattern in the slab was exactly what I was looking for, I decided I would make the long trek to Hayward to go see it for myself and purchase it if it was indeed the correct slab. When I finally got there (over an hour drive), it was the same story as everyone else - the slab was nowhere to be found. Kevin looked at the text thread with the photo I had sent and led me to a stack of stone that looked NOTHING like the picture. He said that not all stone can look identical to the pictures, but this wasn't even close. I looked around at the rest of his warehouse and there was hardly anything there. What a big fat waste of time. Don't waste yours - avoid, avoid, avoid! read more

I received an unsolicited call from these folks in November, 2017 -- the name and phone number (510-351-7557) on the caller ID identified this business, as well as the person on the line identified the business as well. This is an unsolicited call, violating the FCC's "Do Not Call List." I will never do business with companies that cold call and violate the law in this (or any other) manner. read more

Cornerstone was an amazing experience for me. Considering this business is a 30 year family owned, the pricing on materials cannot be compared anywhere else! They give the best price to fit your budget with beautiful selections. It was a hard time finding the one perfect slab for my kitchen island and countertop but Amanda was patient and helped me narrow it down between 2 which made it a lot easier! read more

We have been to every stone yard in the Bay area and came to Cornerstone Marble and Granite on a Saturday around 3:40 (we didn't realize they actually closed at 3:30pm on Saturdays. We called to confirm the address and Teddy who was actually away at a Home & Garden show in San Rafael called the showroom and had them open up and give us a tour of their inventory. They truly do go above and beyond in customer service and I don't know of any other stone-yard you can get this level of service from! We then spent a few days emailing back and forth with a ton of questions which they replied right away with all our options. Before committing to buy the slabs we went back to see if the slabs we chose will match our flooring and cabinets and they had both slabs ready for us to view and even helped us design the best layout for the island. They never once pressured us or rushed us and made the process so enjoyable and helped work within our budget. We bought the slabs at a great price and they have agreed to store them for free until we can get our cabinets ordered and installed. Teddy and Kevin were such a pleasure to be around and like the other reviewer mentioned, they do make you feel so comfortable you could stay there all day. read more

Cornerstone Marble & Granite - Home Decor Near Me - Hayward, California

This is the worst operated business I have been dealing with! They will scam you wherever they can. I bought 2 slabs of granite here, to be picked up by my contractor. I realized that the slabs I bought were a few inches too short, so I drove all the way back to their showroom within a few days and told them that I needed a different size granite. Well they tried to charge me a 30% restocking fee, even though I had not even picked it up yet. Then they had only very few slabs that were 10 feet long. I found one that I liked which happened to be less pricey than the original one. Guess what - they refused to credit the difference! There are many good granite places in the Bay Area, and most of them probably have better business ethics and customer service than this place. Stay away, or consider yourself warned. read more

Worst ever customer experience at any store. Went to this store today and was greeted by a guy who was completely rude and totally dismissive, acted like I was dumb to be asking questions about the slabs and cost of fabrication/install. The funny thing is, he was actually the dumb one, answering questions with incomprehensible single words - sat down for an estimate with my measurements and he couldn't even write down the correct numbers or remember what stone I was looking at - he said, I don't know, you were looking at 4 different ones, how can I remember what you were looking at." (While still sitting in his chair). Sorry, but I'd rather pay more somewhere else and support a business that actually cares. Don't waste your time with this place. read more

Hired them to do a quartzite counter tops for our custom kitchen. We're disappointed With the job. While Kevin tried to take care of us for the poor job on the countertop and even redid the island he never came through at the end to complete the polish. My wife texted him numerous times but the job is still incomplete. Disappointed... read more

For price and quality of product, they get 5 stars, but knocked off 2 just for the way things we're executed...like having to haggle and for other flea market-type tactics that seem unnecessary. Maybe their prices will drop since granite just ain't cool no-mo. read more

Just my first interaction on a large scale kitchen refresh... We were referred here by Michael of Kitchen Experts of California... and thanks to them... knew exactly what I was looking to accomplish. It was all quickly accomplished with class, style & finesse. I was concerned about access for wheel chairs... No problem. Getting an appointment... again, no problem. The place is a little difficult to find... but very well worth the effort. Their selection of granite is inspiring. The staff is better than polite. They are gracious hosts who were interested, attentive and professional. I started to snap pictures of the slabs I thought might work... and they asked if they could do that for me... take the pictures of the slabs and email them to my home. It was a pleasant & enlightening experience. When I got home... High resolution pictures were waiting in my email. If the rest of this job goes as smoothly... and it seems so... I'll definitely be back! This was definitely a 5 Star transaction... Very highly recommended. read more

I was also referred to Cornerstone, and I could not be mor grateful! I was greeted at the door, and was taken thru the large warehouse with a nice cup of hot green tea! It was a quick easy transaction. I was in and out, in under two hours. They delivered the product the following business day, with no issues. Great selection and customer service....and the prices could not be beat! Thanks Scott and Kevin...I appreciate it! : ) read more

Great service & price! Professional and knowledgeable. Had a tour of the entire store with Kevin and Scott. Very satisfied about our findings. read more

Definitely recommend Cornerstone as a go to. Outstanding customer service compared to other Marble and Granite businesses I've visited in the past few weeks. Amanda was a big help to my family and I. Very reasonable pricing for the quality they provide. Can't beat the services they offer! read more

Fantastic customer service and nice selection of slabs. After going to larger more expensive stone yards, my designer and I came here. They must have pulled 15 slabs outside for us to see. We found a beauty for a very reasonable price. Highly recommend. read more

Great place. They were in the middle of moving and still managed to sell us a great piece of typhoon Bordeaux at an awesome price. Thanks.

I bought my slab here. They would get 5 stars if it wasn't for the haggling you have to do. The 3 different times I went in I was given 3 different prices for the exact same slab and they ranged plus/minus 300$ each time. Put your prices on the slabs and people will be much happier. read more

These guys are legit. I needed a small 24"x24" polished granite remnant and they delivered it to me in Mountain View same day. Smooth transaction. read more

Excellent experience with cornerstone. Quality, commitment, reasonable pricing, friendly, prompt. We were in time crunch and were unable to find fabricators in last minute. These guys helped to get the quartzite slabs from MSI, did an excellent job. Alberto did great job fabricating. Teddy the manager was a great guy. I also recommended them to someone I met at MSI. Thanks guys! read more

I was referred here by a granite installer, and as a result will probably continue to use them as I work my way redoing my whole house. Kevin was very helpful, and made the job simple for us, and there is an excellent selection. Definitely recommended! read more

Excellent experience! Teddy is a great person to work with! Very professional and definitely they have a great selection at the best rate in Bay Area. read more

Branson the owner was pretty good considering mine wasn't a big purchase but they need more salesman on the floor for I was there last Oct at least twice to look for granite and tile and I was helped by not their sales person even once. read more

Our granite fabricator friend suggested this place. They have a large selection of stone slabs. Scott and Chalina were very helpful, professional and followed up. Scott helped us find a perfect piece for our project, gave us a sample piece and even sent us photos. Thanks!!! read more

I bought granite from them and found them to be professional, with good prices. They offered some extra services for free, e.g. delivering the slabs to the fabrication facility. We discovered an issue with one order and they fixed it right away. I'll definitely do business with them again and have recommended them to several friends. read more

Let me start by saying the end result turned out absolutely beautiful and I'm very happy with the look and the quality of the granite and fabrication. Kevin was nice to work with for the most part. If the review was based solely on quality and outcome it would be a 5, but professionalism and customer service also factors in which is why I deducted 2 stars. I let Kevin know that we wanted to move quickly on this project for our kitchen countertops. He was very quick getting the measurement set up. The company they work with that does the fabrication and installation showed up late to every scheduled appointment. An hour late to the initial measurement, 45 minutes late on day one of installation, and 30 minutes late on day 2. On the day of the measurement I was told the countertops should be ready to install the following Tuesday or Wednesday and that I would receive a call when they were finished and ready to install. I heard nothing until the next Wednesday morning letting me know they were coming to install the countertops in an hour. Absolutely no notice in advance that I needed to be home for an installation crew. I was also not told that it would require two days to install, and when I asked what time they would be coming back on Thursday the worker said he didn't know. I had to have the guy call his boss to set up a time and shuffle some other appointments around and they showed up late again. Then I received a call from Kevin about 30 minutes letting me know I needed to write a check for the remaining 50% of the project and give it to the workers before they left. I had paid the first 50% by card in their office and was never told the last half needed to be a check given that day, which was fine except for the fact that my husband had the checkbook with him and had left for work already. I had to call him to come home to write the check. Kevin did say we could wait to pay but it was easier to be done with it. I think this place is fantastic as a supplier, but I would be hesitant to use them again for the fabrication and installation. read more

I found Kevin on Craigslist when I was looking for granite. I had a specific type I wanted. He emailed me photos of similar types with prices. After checking around, I found that the prices were the best I could find. . with several contractors telling me that I could not get it for the price given. We met with Kevin who graciously let us come on a Sunday, a day they are usually closed. We found many different beautiful slabs. .but finally chose the one we wanted. We also were given green tea, which is a very nice touch. I have given Cornerstone and Kevin's name out to several contractors as they all told me that the stone would cost around $3,500 for our job. . when I ended up paying about $1,800. We haven't picked up the stone yet. . and they said they would keep it for us until we were ready for it. But I have to say that the customer service, selection and price were outstanding. read more

great place to shop for kitchen counter tops many different patterns to choose from. kevin and there crew made me feel welcome and were very helpful in choosing the right countertop....thanks guys ill tell all my friends thanks again ed hamalian read more