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DSG has been the communities #1 Grading & Authentication Company since 2001. With over 20 years of experience in the industry, we have realized one thing that most don’t. Integrity is everything.

We are located in California in the San Francisco Bay area.

Ship all orders to the following address:

Diamond Service Grading
PO Box 3550
Rohnert Park, CA 94927

707-755-7101

[email protected]

We are located in California in the San Francisco Bay area.

Ship all orders to the following address:

DSG
PO Box 3550
Rohnert Park, CA 94927

If using FedEx or UPS to ship packages, please send to the following address:

DSG
5681 Redwood Drive, Suite 12b
Rohnert Park, CA 94928

[email protected]