Diamond Service Grading - Rohnert Park, California

Mr. N. G. Z.

Thank you all at DSG!!! Absolutely phenomenal!!! Slabs are immaculate. They are airtight, nearly indestructible, as well as infused with uv resistance.
The .5 system means, a more accurate grading assessment. It uses professional human and computer algorithms to help assess the grading process. Instead of guessing why my cards came back better or worse than I thought, I can check it out on my own. That is amazing. I hate the guessing game.
The turn around time is so fast. I posted pictures. Im sure you can tell, since my first slab from DSG, I have been impressed. I will add the Star Trek set slabs I have in when it comes back to me!

Coleman L.

My experience with DSG was great. I sent in my Pokémon card and I got it back about 3 weeks later! Faster than what their standard time is listed at. Their customer support was great. I emailed at midnight once, and got a response just 5 minutes later! I emailed them a couple other times and they always responded within a reasonable amount of time.

Their grading process/algorithm is pretty cool. It shows you exactly why your card got the grade it got. The custom label and encapsulation looks amazing.

My card is in terrible condition so it wasn’t a surprise that it got a 1. I’m just glad it has a good looking home now. Thanks DSG!

John W.

I went there to get my cards graded and they were nice, pleasant , social & helpful. I left them there and came back to get them. He said” you’ll like their grades!” I said” I hope so!”
“ You will!” I said “ Super”
When he showed me I was like “ 😱what!” Cause these are my first cards that I’ve ever gotten grade!”
We’ve talked about the game and I gotten them it was nice and fun.

James C.

I love DSG. After dealing with PSA, SGC and others, I can say that DSG is my favorite. Submission is easy and no upcharge! Please don’t change that. I had to pay $250 to grade a card at SGC. Diamond is very accurate and just as if not more accurate than the “leaders” in the industry. I also LOVE the report with the card as opposed to just accepting what they say with no reason. I really hope a DSG GM10 is the same as a PSA/SGC/Beckett very soon because I personally think they are better.

Still hoping for a 10 from them! My best is a 9.5

-James (happy customer)

Timothy D.

I just visited PSA, Beckett, and DSG at Long Beach Collect-a-con the past 2 days, and DSG was WAY more personable, knowledgeable, and professional than the others. My wife asked what the difference between PSA and DSG was, and they replied, " DSG cases use polycarbonate and are much stronger than the acrylic cases used in PSA." Diamond Service Grading has my vote all around. We will see how the grades come back and how long it takes compared to PSA ( I submitted cards with both PSA and DSG).
Edit: I got the cards back from DSG in 2 weeks, I got cards back from PSA in 3.5 months.

Wyatt A.

I love this grading company! DSG has such accurate card grading and is the fastest card grading service I know. All of my cards that I’ve gotten graded there have always come back within just a week or two. DSG also has amazing customer service and you can always trust their team with your cards!

Rod A.

WOW, so much confidence in Diamond Service Grading,that I had them grade my Pete Rose cards from childhood. Professional, and trustworthy
Thanks Rod Aguilar

MTG F.

I had a few Pokémon cards and a signed magic card graded by this company. I was pleased with the service got them back in a good amount of time and they have The QR codes on the back that allow you to scan it and see why your car got graded the way it did