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About Our Loose Diamonds

We are family owned diamond cutters and jewelry manufacturers specializing in high quality, laboratory certified diamonds. Since 1999, we have been using the Internet to offer our exceptional service and products online directly to the public at wholesale prices.

#1 Diamond Source is a member of the Better Business Bureau (A+ Rated), the Jewelers Vigilance Committee and a registered StopBloodDiamonds.org jeweler. To view recent reactions from our Internet clients, you can go to feedback-2017 . All our loose diamonds and those used in our diamond rings, earrings and jewelry are purchased from legitimate sources. We sell only non-conflict diamonds.

Our loose diamonds are all independently certified by the Gemological Institute of America and come with the original GIA certificate. And, they are carefully examined and authenticated by our in-house GIA Gemologist and GIA Diamond Grading Graduate. We sell only pure, 100% natural diamonds; absolutely no clarity enhanced or treated stones. We also provide free insured FedEx shipping and a free comprehensive insurance appraisal upon request.

#1 Loose Diamond Source for Certified Diamonds

bullet Search online for GIA or AGS loose diamonds at wholesale price:

Quick Diamond Search

Comprehensive Diamond Search

• A GIA graduate will always examine your loose
stone selection and report to you.

See our Loose Diamonds Specials

bullet Extensive selection of Ideal and Excellent cut certified diamonds.


Sizeable inventory of Ideal,

"Hearts & Arrows" &

"Triple-Excellent cut" diamonds

bullet You can rely on our trustworthy advice and personal caring service.

Buying Diamonds Online - Education:
In order to make the best diamond selection, you need to understand what you're buying. We suggest that you visit our online diamond education section where we offer simplified discussion on diamonds four Cs (cut, color, clarity, and carat weight) and important guidance. This guide will familiarize you with the criteria that jewelers use to grade and evaluate diamonds. Understanding the four Cs of diamonds will help you make the right diamond choice. For key guidelines to get the finest loose diamond at the best value while minimizing your risk you can refer to: Buying Loose Diamonds Online.

BBB Review (8/15/2016)
#1 Diamond Source - I found my perfect diamond on line. Saved $$ Jewelry store markup. They have a few payment options to fit your needs. I chose bank wire to their account...Ron and Lois previewed the diamond under a mircoscope, it was inscribed GIA and exactly and GIA report stated- no surprises. Diamond arrived within 3 days as promised. I could not be happier with my diamond and experince with 1 Diamond Souce
-- Bruce from Milladore, WI

"I have received the loose diamond and I am very pleased. It is exceptional!!!.
I hope to do business with you again soon. Thanks again."

-- Donna from Brentwood, CA (03-15-2002)


CORPORATE OFFICE*: #1 Diamond Source 36 W. 47th St. New York, NY 10036

OFFICE HOURS: M - F (By Appointment)

* Selling at wholesale to the trade and retail to the public.

BBB A1 Rating Jewelers Vigilance Committee Rated: Jewelers Board of Trade Certified: Gemological Institute of America Free Insured FedEx Accept: Visa Accept: Master Card

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Copyright © 2018 #1 Diamond Source
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