Your search for "Powerstone Shard 227" revealed the following:
Powerstone Shard (Foil) (DOM) from Dominaria, available at 401 Games Canada. Rarity: Common Finish: Foil Artist: Lindsey Look Card Text:T: Add C for each artifact you control named Powerstone Shard.
Powerstone Shard - DOM Reprint (PLST) from The List, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Lindsey Look Card Text:T: Add C for each artifact you control named Powerstone Shard.
Powerstone Shard (DOM) from Dominaria, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Lindsey Look Card Text:T: Add C for each artifact you control named Powerstone Shard.