Wholesale Diamonds Source

Personal Attention:

Call to consult with
our GIA Gemologist:
646-470-0012

Huge Selection:

50,000+ loose diamonds
GIA or AGS certified
Lowest cost Guarantee
Conflict free diamonds
Excellent, ideal cuts

Finest Service:

Free FedEx ®
Free Appraisal
GIA Gemologist
No-Risk Guarantee
Manufacturing Facility

Members:

Recent Testimonials:

Early Testimonials:

Family Owned Loose Diamonds Wholesaler

We are master loose diamond cutters with multi-generation experience in the wholesale diamond jewelry industry. #1 Diamond Source only sells natural diamonds that are laboratory certified and our GIA Graduate Gemologist provides personal guidance on your diamond purchase. Our company sells diamonds loose or we can custom set your diamond choice at our in-house factory. We also offer custom diamond cutting and repair service on all cuts, shapes, and sizes and provide free consultation and advice on polished and rough diamonds. High quality rare and large diamonds is our specialty.

We are "A+" rated by the Better Business Bureau and are members of the Jewelers Vigilance Committee. On the internet since 1998, we have offered our exceptional service and products online directly to the public at wholesale prices. All our diamonds come with an independent lab certificate and a written guarantee to be conflict free diamonds originating from ethical and socially responsible sources.

Our huge inventory with over 50,000 stones includes colorless and near colorless diamonds (GIA: D to K). Our loose diamonds range in clarity grade from Flawless to "Slightly Included" (GIA: FL to SI2). The Diamond shapes that we offer are: Round, Oval, Princess, Pear shape, Marquise, Heart shape, Radiant, Cushion, Emerald cut, and Asscher (square Emerald). We can custom supply most other shapes upon request. #1 Diamond Source does not sell artificially treated or clarity enhanced diamonds. We only sell 100% natural daimonds.

#1 Source for GIA Diamond Online

Huge inventory of certified diamonds

Select your favorite loose diamond shape:

View our extensive diamond inventory:
-Basic Search or Detailed Search
Loose Diamonds Specials at the lowest wholesale cost.
Free appraisal, insured shipping and No-Risk return policy
Guidance from in-house GIA Gemologist on your diamond selection.
Choose from over 50,000 GIA certified diamonds at wholesale prices

Ideal and GIA Excellent cut diamonds

"Hearts & Arrows" and
GIA "Excellent cut" diamonds
AGS "Ideal cut" diamonds available

Expert advice, personal and caring service

Guidance in person from a GIA Graduate and diamond jewelry expert.
- We do not drop-ship diamonds indirectly.
Custom design and set your diamond at our in-house factory.

Better Business Bureau (A+ Rated) & Jewelers Vigilance Committee members.

Listed under "Diamonds" category in the BBB Accredited Business Buyer's Guide (2014).
Our company fully support the United Nations "Kimberley Process" resolution.
- We sell only non-conflict diamonds.
Our honesty and fairness have been tested and earned online since 1999

View high quality certified loose diamonds arranged by wholesale price range

View high quality certified loose diamonds arranged by carat weight range

Essential Diamond Education and Guidance

Essential Diamond Purchase Education and Guidance
Learn about the four main factors which determine diamond value.
Learn about your favorite diamond shape.
Learn about buying loose diamond online at the best value and lowest risk.

BBB Review (4/4/2018)
Working with Ron was such a great experience, I Iive in Dallas and he is located in New York but despite this, communication was perfect. The final product was stunning. I would refer him to anyone and use him in the future for sure. Great experience.
-- Danny (from Dallas, TX)

..."Talk about "WOW!". The marquise diamond ring arrived safe and sound but I was not prepared for what I saw... the engagement ring is breathtaking. It is everything you represented it to be and the setting is exquisite.
Thank you so much for your patience and guidance in helping us with our selection and the great wholesale price."

-- Jerri and Bill from AR (6/24/2003)