How to get it
- Buy it from the shop or claim eligible research, event, and Showcase rewards.
How to use it
- Activate it before catching, hatching, or claiming the Stardust reward you intend to boost.
- For a large claim, confirm the Star Piece timer is running before collecting the reward.
Worth knowing
A busy catch session or a large GO Battle League reward can yield more value than an idle half hour.
Additional Star Pieces extend duration rather than multiplying the item’s 1.5× bonus again.
Calculate the benefit
A reward worth 20,000 Stardust becomes 30,000 with a Star Piece: 10,000 extra. When an eligible event already triples that reward, the combined factor is 3 × 1.5 = 4.5, not 3.5. Event restrictions still determine which rewards qualify.
Some catches are worth much more Stardust
Some species award much more Stardust per catch than ordinary Pokémon. For example, an ordinary unevolved Pokémon gives 100 Stardust, Shellder gives 1,000, and Audino gives 2,100 before bonuses. A Star Piece adds 50, 500, or 1,050 respectively.
Weather adds another multiplier to eligible catches. For example, a weather-boosted Shellder gives 1,000 × 1.25 × 1.5 = 1,875 Stardust with a Star Piece, before any event bonus. The practical gain depends on what you catch during the timer, not just the number of throws.
| Catch | Base Stardust | With Star Piece |
|---|---|---|
| Ordinary unevolved Pokémon | 100 | 150 |
| Shellder | 1,000 | 1,500 |
| Audino | 2,100 | 3,150 |
Sources & further reading
- Pokémon GO: A Quantitative Approach by nick blackVersion 1.0.6 (October 4, 2026), §2.5, p. 10; Table 2.8
Event rewards, shop offers, and limits can change. Check the current in-game description for event-specific rules. Worked examples are illustrative calculations.