Is Moss Diamond legal in Standard, Modern, and Commander?

Moss Diamond is legal in: Legacy, Vintage, Commander, Pauper.

What type of card is Moss Diamond?

Moss Diamond is an Artifact. Its oracle text reads: "Moss Diamond enters tapped.{T}: Add {G}."

Artifact

Moss Diamond enters tapped.<br>: Add .

Set Mirage

Rarity Uncommon

Artist Donato Giancola

Artifact Commander Pauper Legacy