BigDiamondsUSA is the Source
for Superior Quality Enhanced Diamonds!

BigDiamondsUSA Inc.
35 Years in Jewelers Row
Downtown Chicago

Patrick Fay /Owner
29 East Madison Street
Suite #1510
Chicago, IL 60602

Phone: 877-795-1101
(within US) or 1-312-795-1100 (Outside the U.S.)

Appointment Hours:
By Appointment Only, Monday – Friday, 2 PM – 6 PM Central Standard Time. We are closed on weekends.

Business Hours:
Monday – Friday, 12 PM - 7 PM Central Standard Time. We are closed on weekends.

Email Us at Anytime: is a wholly owned division of Patrick Fay Diamonds Incorporated, based in Chicago, Illinois. Patrick Fay is an internationally known and respected wholesale diamond dealer for over 35 years. Patrick Fay was fortunate to represent and study diamonds under the direction of a direct diamond "sightholder" of DeBeers Diamond Trading Company. There are only 85 DeBeers diamond "sightholders" in the world, and it is considered the very elite of the diamond industry. specializes in superior quality, clarity enhanced diamonds- the "diamonds of the future" and the best values in diamonds today. We have had hundreds of satisfied clients both domestically and internationally, and with our qualifications and over 35 years of diamond experience and knowledge....

"It will be like having an Uncle in the diamond business!"

BigDiamondsUSA have been selling diamonds directly to jewelry stores all across America for over 35 years. Diamonds is our only business and we know them well. We buy rough/uncut diamonds directly from the mines and cut them into beautiful sparkling diamonds in our cutting and polishing facilities in Israel and Belgium. We are a direct source, from the diamond mines to your finger, which means NO MIDDLEMEN. The diamonds in our store are the same diamonds you see in your local jewelry stores, but our diamonds are more beautiful and at less expensive prices. A diamond does not need to be expensive to be beautiful, and we don't sell low priced diamonds. We sell BEAUTIFUL DIAMONDS at LOW PRICES.

At BigDiamondsUSA, every diamond we sell is especially selected for its quality and value by Patrick Fay, the owner of BigDiamondsUSA. We are very proud of the diamonds that we sell, and you too will be proud. With every diamond purchase, we provide an United Gem Laboratory Diamond Grading Certificate and a Retail Appraisal for your insurance company. We Are Qualified and Experienced! We have bought and sold diamonds for the past 35 years, and chances are we have even sold diamonds to your local jewelry store. Our company adheres to strict standards of Integrity, Professionalism, and Excellent Customer Service. So be confident in selecting BigDiamondsUSA for the perfect diamond, and know that we are just a phone call or an e-mail away in answering any and all of your questions and concerns about diamonds.

We welcome ALL your inquiries and have answers to ALL of your questions. We are the experts in clarity enhanced diamonds. We know our diamonds well and can assist you in selecting the perfect diamond. Our hours of operation are 1pm-6pm Central standard time. If you reach our voice mail please make sure to leave us a message, and we will return your call ASAP. You can also email us at or chat with us live using our Live Support. You can also submit us a message using the Comment Box (click here)=> Contact Us We look forward to hearing from you!!!

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Customer Reviews

I received the ring this morning. It was beyond amazing. I'm so glad that I came across Big ... read more

-Landry C., Texas

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