Certified Loose Diamonds Source at Wholesale

# 1DiamondSource.com

   Wholesale Diamonds Source for Loose Diamonds

Shiny diamnds at Wholesale Prices

HomeAbout #1 Diamond SourceBest ServicePolicy & GuaranteeFine Diamond JewelryLoose Diamonds

Family Owned Wholesale Diamonds and Jewelry Manufacturer

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 expert 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’ve 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 J).  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.


#1 Source for GIA Diamond Online

Huge inventory of certified diamonds

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.

Wholesale diamonds with 25 years experience!

High quality certified diamonds arranged below by wholesale price range:

Buy Round Cut Loose Diamond:

Buy Princess Cut Loose Diamond:

Buy Radiant Cut Loose Diamond:

Buy Emerald Cut Loose Diamond:

 Buy Asscher Cut Loose Diamond:

Buy Cushion Cut Loose Diamond:

Buy Oval Cut Loose Diamond:

Buy Pear Shaped Loose Diamond:

Buy Marquise Cut Loose Diamond:

Buy Heart Shaped Loose Diamond:

View high quality certified loose diamonds arranged by weight range.

   4 Cs - Loose Diamond Value Factors

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.


...The jeweler who will be putting the ring together was impressed. You may have a new wholesale customer.
 Lee in Texas

..."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 in AR


#1 Diamond Source BBB Business Review  HACKER SAFE certified sites prevent over 99.9% of hacker crime. Secure Site

All our credit card transactions are tested daily and secured

Wholesale Loose Diamonds with Free Shipping and 30-Day, No-Risk Guarantee!
#1 Diamond Source 
36 W. 47th St.
New York, NY 10036
M - F 9AM - 6PM (EST)

Click for: Location Map

Map: #1 Diamond Source for Wholesale Diamonds
Questions?: 1-877-968-7342

   [ Home ]  [ Loose Diamond Source ]  [ Site Map ]  [ Your Fine Jewelry Source]