User blog comment:AngerIssues63/Disapearing diamond?/@comment-4740961-20120414181734/@comment-4740961-20120415222653

They dont have value in the game BUT here its the difference:

Diamond:

Breaks: Everything

Speed:7/10

Rarity:10/10

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Gold:

Breaks: Stone, and Coal

Speed:10/10

Rarity: 7/10