33 cards where the illustration contains “diamond”

Charcoal Diamond (Commander Legends: Battle for Baldur's Gate #305)
Charcoal Diamond (Commander Legends: Battle for Baldur's Gate #442)
Demilich (Adventures in the Forgotten Realms #53)
Demilich // Demilich (Adventures in the Forgotten Realms Art Series #4)
Demilich // Demilich (Adventures in the Forgotten Realms Art Series #4)
Diamond Valley (Arabian Nights #73)
Fire Diamond (Commander Legends: Battle for Baldur's Gate #313)
Fire Diamond (Commander 2014 #240)
Fire Diamond (Seventh Edition #296)
Fire Diamond (Commander Legends: Battle for Baldur's Gate #445)
Gemstone Array (Fifth Dawn #124)
Gold Pan (Outlaws of Thunder Junction #242)
Infected Defector (March of the Machine #18)
Kaleidostone (Conflux #137)
Lion's Eye Diamond (Vintage Masters #271)
Lion's Eye Diamond (Mirage #307)
Marble Diamond (Commander Legends: Battle for Baldur's Gate #320)
Marble Diamond (Commander 2014 #248)
Marble Diamond (Seventh Edition #306)
Marble Diamond (Commander Legends: Battle for Baldur's Gate #446)
Moss Diamond (Commander Legends: Battle for Baldur's Gate #327)
Moss Diamond (Commander 2014 #252)
Moss Diamond (Commander Legends: Battle for Baldur's Gate #448)
Mox Diamond (Stronghold #138)
Mox Diamond (From the Vault: Relics #10)
Oracle of the Alpha (Alchemy: Dominaria #4)
Rarity (Ponies: The Galloping #3)
Rowdy Crew (Ixalan #159)
Savvy Trader (Outlaws of Thunder Junction Commander #33)
Sky Diamond (Commander Legends: Battle for Baldur's Gate #337)
Sky Diamond (Commander Legends: Battle for Baldur's Gate #449)
Super Secret Tech (Unhinged #141)
Talisman of Conviction (Modern Horizons #230)
Treasure (Lunar New Year 2018 #1)

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