A Comet Shard.
- "A shard that fell to the ground when a comet approached. It can be sold at a high price to shops."
- — Flavor Text, Pokémon Moon and Sun
The Comet Shard (すいせいのかけら, Comet Shard) is a valuable item that was introduced in Generation V. It has no side-effect, despite being pursued by a treasure maniac in Icirrus City, who will buy it for a price of 
60,000. Comet Shards can be found at the Giant Chasm, and are sometimes held by wild Cleffa, Clefairy, Clefable, Lunatone and Solrock.
In Pokémon X and Y they can be sold for 15,000 at Poke Marts#
In Pokémon Moon and Sun, Comet shards can be sold for 30,000 at any Poke Marts