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

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

What type of card is Marble Diamond?

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

Artifact

Marble Diamond enters tapped.<br>: Add .

Set Mirage

Rarity Uncommon

Artist Jeff Miracola

Artifact Commander Pauper Legacy