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CDI Diamonds & Jewelry Columbus, Ohio

CDI Diamonds & Jewelry is owned and operated by Matt Carlozzi Jr. Formally Bernie Helmick Diamonds and Gold, CDI has been serving the Columbus area since 2001. For many years CDI has been known for its exceptional prices on certified loose diamonds & engagement rings as well as their customer service, knowledgeable, honest staff and most importantly no pressure sales approach as supported by their over 300 5-star Google Reviews. CDI also specializes in Wedding Bands, Fashion Jewelry as well as expert jewelry repair, custom design and appraisal services by their in-house Graduate Gemologist. With over 90 years of combined jewelry experience, you owe it to yourself to stop in and see the difference.

See Inside CDI

Read our Google Reviews

Erin Shafer
Erin Shafer
01:07 28 Jun 19
I took my engagement ring to CDI to be appraised. The staff were super kind and helpful. They had the best prices out of anyone I called and even offered to do same-day appraisal if I dropped it off early in the day. When I came back to pick my ring up, he explained the appraisal to me and sent me home with an insurance recommendation and some jewelry cleaner! Thanks CDI!
Indranil Majumder
Indranil Majumder
23:09 13 Jun 19
Our CDI experience was absolutely wonderful! Matt was very nice to work with, he knew exactly what we were looking for. The first day we were there, he showed us some diamonds and settings. We told him that we liked a couple of the stones and mounts, but didn't tell him the exact combination. Once me and my wife decided which combination to buy, we went back to the store and guess what?? Matt had already sent the diamond and ring to be finished (before we even confirmed and paid for it), he said we could pick it up the next day. He was so confident of what we would decide on that he didn't even wait for us. He was absolutely right! We were very impressed, it definitely shows that he knows what his customers want.
Adam Sizemore
Adam Sizemore
01:27 11 Jun 19
Such a wonderful store to bring my happiest day to life. I had only a vision in my mind and this team was able to bring it to reality. I know its hard to believe but the final product was even better than I could have imagined. Thank you CDI team!!!
Terri Roehrenbeck
Terri Roehrenbeck
02:10 30 May 19
I recently noticed the prongs on my wedding ring were snagging thing so I took it to CDI to be fixed. When Ernie called me to say the ring was ready fo pick up he also told me to bring my other rings in and he would clean them. My wedding ring looked like new and the other rings sparkled after a professional cleaning. I am very happy with CDI as the cost of repair was very fair and everyone in the store could not have been nicer. I highly recommend this jewelry store.
Pat Halpin
Pat Halpin
14:41 23 May 19
Wonderful! We had a wedding band made for my wife to match an existing band that she had. We were blown away with the results! Not only does the band look great, it matches the other rings in the set so well. The whole ring looks like it received a facelift. The team at CDI was so helpful as well and the timeline they gave us for the finished product was spot on. We highly recommend and will most certainly be going back.
Brian Carothers
Brian Carothers
22:15 19 May 19
Matt and his team are the best in the business. I contacted him in the early stages of engagement ring shopping (knowing nothing about jewelry when I did) and immediately went from feeling overwhelmed to excited. He was patient, thorough and worked with me to come up with a BEAUTIFUL custom ring. Don't waste your time going to one of the big chain jewelers. CDI provides top notch service with value and excellence that other jewelers don't come close to. Thank you for everything!!
Nick Dodson
Nick Dodson
14:46 13 May 19
Amazing experience!!! I am not sure what I would have done without Matt and his incredible staff. Buying an engagement ring is a very nerve wrecking experience, especially for someone like myself who has zero experience buying any type of jewelry. Matt gave me all the information I needed while teaching me all the ins and outs of how to look at and determine the worth of each diamond. He was knowledgeable and helpful with every aspect of my experience of buying and engagement ring. Thanks again to Matt and his amazing staff!!!!
Karriann Wood
Karriann Wood
14:55 19 Apr 19
Matt and Ernie are so amazing! They had the exact necklace I wanted, and I walked out with another diamond necklace and a unique diamond ring! Their selection was beautiful and their customer service was outstanding! Also, they sized my ring really fast so I could take it on vacation! Matt and Ernie both treated me like I’ve known them for years! I highly recommend CDI for all your jewelry needs!
Lisa P
Lisa P
16:32 22 Mar 19
Matt was very helpful in assisting my fiance in choosing my engagement ring, which I often receive compliments on. They knew I wanted something simple, yet the ring is so elegant and unique. We could not have asked for a better product or service. We recently visited again to choose wedding bands, and there is a large selection of jewelry for other occasions as well. I would highly recommend CDI.
Kristi Samples
Kristi Samples
01:57 15 Mar 19
Everyone at CDI has always been helpful, friendly and professional. Their beautiful selection of jewelry is top notch and they always go above and beyond my expectations with customer service. I have had multiple rings sized and cleaned and each time they come back looking brand new. 13 years ago my husband and I picked out our wedding rings and bands and we have been going back for any of our jewelry wishes since. I highly recommend CDI to anyone looking for a beautiful piece of jewelry and terrific customer service.
Kelly Miller
Kelly Miller
17:50 24 Feb 19
GREAT experience! Highly recommend! If you are looking for an engagement ring, need expert jewelry advice, want patience in selecting the perfect diamond or band, or are looking for any type of jewelry or repair, this is your place. We went to all the big name places and am so grateful to have run into CDI. My fiance and I had picked out an engagement ring online together and it was pretty, but not exactly what I had in mind. So, we decided to go a different route. I had received my mom's diamond from her engagement ring, and had a pair of diamond earrings from her as a gift, both in yellow gold. My heart was set on a white gold, trellis-style 3-stone ring all along, so I spoke to the manager, Ernie, at CDI and he found the perfect mounting online to set my 3 stones in. It only took about 1 week to receive my new ring, it was extremely reasonably priced for the mounting and labor, and is ABSOLUTE GORGEOUS!!! Everyone at CDI is friendly, professional, knowledgeable, and you never feel pressured or rushed. GO HERE...trust me. They will have what you need, or will get it for you, have great quality items, good sales, and will give you a fair price. HIGHLY RECOMMEND!!!!
Dilshad Tolliver
Dilshad Tolliver
20:57 14 Feb 19
After my husbands passing in 2015, I wanted to keep the wonderful memories of him and our love- my wedding ring. I walked into CDI diamond store and wanted to convert my ring into something I could wear everyday. They helped me design another ring with it along with some unique earrings. I was so happy and cried after I left there. This was an emotional decision and they made it so memorable. I would recommend this store to anyone that is looking for some jewelry for their loved ones. Thank you!
Michael Thomas
Michael Thomas
15:08 11 Apr 18
I dealt with Matt and I could not have had a better experience. I had little to no idea what I wanted/needed when buying an engagement ring and he walked me through the entire process. He was there to take my calls, answer emails in a timely manner and understood that this is a big purchase and took the time to find the right diamond. Matt never once tried to push me into something I didn't want just to close the sale early or buy something I didn't need. He is a true professional and I had a great experience dealing with him. On top of all of the great customer service, the diamond is beautiful and price was unbeatable. I highly recommend CDI.
Cameron Sheehan
Cameron Sheehan
13:47 11 Apr 18
To start, I am a medical student on a budget who was looking for the perfect engagement ring. I went to roughly 6 diamond stores before coming to CDI. Before this store, I felt like I wasn't being taken seriously because of my budget and no one really made time to help me. After getting drowned in thousands of rings with Halos, I finally stumbled upon CDI who gave me the freedom to completely customize the ring you see below. Matt ordered a few diamonds with my specifications/price range and gave me the opportunity to pick everything for myself. I would highly recommend this place to anyone and already have friends who will be visiting in the upcoming weeks. Thanks for everything Matt and team.
Gabrielle Gaglione
Gabrielle Gaglione
16:14 05 Apr 18
My fiancé got my engagement ring here and it’s absolutely beautiful. I wanted something a little different and what he received from them was just perfect. I get compliments all the time on my ring . My main request was it to be rose gold and sparkly and it definitely fits that bill. The customer service is great and they were very willing to resize my ring when I wanted it a little tighter. We will both be getting our wedding bands here and I can’t wait to see how they turn out !
amanda despo
amanda despo
13:52 30 Mar 18
When my fiance put the engagement ring on my hand, I cried. We were promising a life together full of love and adventure. Every moment was perfect especially the ring! I could not have picked out a better setting than my fiance did. I absolutely love my ring and I am still blown away by its beauty. We cannot wait to come back to CDI Diamonds & Jewelry to pick out our wedding bands! Thank you all so much for guiding my fiance through the process and helping him pick out the perfect ring!
Pulcritudiness Princess
Pulcritudiness Princess
23:13 26 Mar 18
My fiancé purchased my engagement ring and wedding band from CDI diamonds & jewelry, I can't fathom any jewelry store doing a better job. Believe me I've tried. They were not only consistent with getting back to me on my concerns in a timely manner, they made sure that I received the ring of my dreams, the exact way I dreamt it. In other words, "dreams come true at CDI DIAMONDS & JEWELRY." I could go on and on about their professionalism, promptness, humanly kindness, consideration and amazing prices. I won't. Here's the beaut in person. Go see for yourself!
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