The stories

Everything a collector should know.

What a coin is worth, what to look for, what to avoid — and the stories behind the coins collectors chase.

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Welcome to the Coinzy blog. Identification guides, value insights, expert Q&As, rare coin stories, and everything else you need to know about your collection.

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Grading & appraisalUS

How to Check a Coin Certification Number

Learn about checking a coin certification number: check the evidence, avoid common mistakes and keep clear records with practical steps for collectors.

Oct 7, 2026

Grading & appraisalUS

What Does a Details Grade Mean for a Coin?

Learn about understanding a Details grade: check the evidence, avoid common mistakes and keep clear records before deciding what to buy, sell or keep.

Oct 6, 2026

Grading & appraisalUS

Mint State and Proof Grades: What They Mean

Learn about reading Mint State and Proof grades: check the evidence, avoid common mistakes and keep clear records with practical steps for collectors.

Oct 5, 2026

Grading & appraisalUS

How to Submit a Coin for Professional Grading

Learn about preparing a grading submission: check the evidence, avoid common mistakes and keep clear records before deciding what to buy, sell or keep.

Oct 4, 2026

Grading & appraisalUS

How to Work Out Coin Grading Costs

Learn about estimating the cost of coin grading: check the evidence, avoid common mistakes and keep clear records with practical steps for collectors.

Oct 3, 2026

Grading & appraisalUS

PCGS vs NGC: How to Compare Coin Grading

Learn about comparing PCGS and NGC services: check the evidence, avoid common mistakes and keep clear records before deciding what to buy, sell or keep.

Oct 2, 2026