Diamond Service Grading (DSG) is a trusted card grading & authentication service with vast expertise and experience in the sports and gaming collectibles world. 
  
We proudly have the best encapsulation in the industry. It is a crystal clear, UV-protected, acid-free, archival-safe, polycarbonate encapsulation that will prevent fading and protect your card. With its patented design, it is also airtight and watertight to further protect your collectible. 
  
Our expert grading staff has over 30 years of grading and collecting experience. We are counterfeit-detecting experts so you can always have confidence that if it is in a Diamond Service Grading encapsulation, your card is 100% authentic and graded accurately. We are collectors too and love our collections, so we understand the passion you have for your collection and how you desire the very best in preserving your favorite cards. DSG offers a product and service that real collectors can trust for their personal collection. We believe in "Quality First, Every Step of the Way".

Diamond Service Grading Inc

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