For over 50 years, our family has been large diamond buyers.  We are also fine jewelry buyers and fine watch buyers enjoying customers and collectors all over the world.  CLICK HERE to browse our free estate jewelry value guide.  We are internationally known as large diamond buyers and fine watch buyers for good reasons... honesty and integrity.  We have associates in all USA large diamond markets as well as most world markets including Israel, Belgium, England, India and Asia.  CLICK HERE to contact us regarding your special large diamond for sale. 

I personally make sure you experience a safe, fair and confidential transaction.
Large Diamond BuyerLarge Diamond Buyer

We are round large diamond buyers because a round round cut diamond is the most brilliant of all the diamond shapes.  Brilliance (sparkle) is dependent on the proportions calculated by Tolkowsky way back in 1909.  These ideal proportions have been proven to reflect and disperse light in the most effective way and that is why the round shaped diamond enjoys the most demand.

Please CLICK HERE to tell us about your round diamond for sale.
large pear shaped diamond buyerLarge Pear Diamond Buyer


Pear shaped diamonds may not be the most brilliant of all the shapes but the teardrop outline lends itself to many designs where a round will just not flow.  As a pear shaped large diamond buyer I am pleased that the market price has gone up significantly over the past decade.

Please CLICK HERE to tell us about your pear shaped diamond for sale.
large square diamond buyerLarge Square Diamond Buyer


Whether you have a radiant cut, princess cut, Asscher cut, emerald cut or other square/rectangular shaped diamond fine examples have hit very high prices.  Some consider these shapes the most elegant of all the shapes.  Historically these shapes have not enjoyed high market value compared to rounds.  Thankfully, many retail buyers have embraced these shapes and therefore market values have increased.

Please CLICK HERE to tell us about your diamond for sale.
If you want a diamond ring buyer PLEASE CLICK HERE.
If you would like a Patek Philippe buyer PLEASE CLICK HERE.
If you are searching for GIA diamond buyer PLEASE CLICK HERE.
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Large Diamond Buyer Certificates
Are you ready to contact our Large Diamond Buyer?  Simply Click Here to contact us.
I will personally make sure you experience a safe, fair and confidential transaction. Thank you.
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gemwin.com is a buyer of large diamonds of all shapes and qualities.  We are not endorsed nor affiliated with The G.I.A. (Gemological Institute of America) CLICK HERE for GIA's website.  We are not endorsed nor affiliated with E.G.L. (European Gemological Lab) CLICK HERE for EGL's website.  We are not endorsed nor affiliated with AGS (American Gem Society) CLICK HERE for the AGS website.
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