We have a fine reputation as a large diamond buyer and if you are ready to sell a large diamond now please fill out the below form, then press "submit".  We will promptly get back to you.  Keep in mind the more information you give us (in the comment section below) the faster the process will be.  Most large diamonds are certified, please include the lab name and certificate number.  We are registered with most major diamond grading labs so we can see the specifics of the diamond for sale (measurements, color, clarity, proportion details, etc).  If the diamond has no certificate (only an appraisal) please type the main details in the comment section below:

Measurements / Weight
Color / Clarity
Table % / Depth %
​Fluorescence

Usually large diamonds are set into jewelry, please also give us a brief description of the piece (if applicable}.

I will personally make sure you experience a safe, fair and confidential transaction.

    For your security and ours, please complete the large diamond buyer form below,
    ​then press "submit". We will contact you with our secure email address.  Then we can continue with safe and secure communication.

certified large diamond bueyr
large diamond buyer certificate
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.
Privacy Policy
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.
Copyright 2006 - 2023
Enter your name here
Let us know your email address so we can get back to you.
Tell us your certificate Lab name and number in the comment section below.
Please enter your asking price in US dollars