You use a Purified Gem in Pokémon GO during Shadow Raids when the Shadow Raid Boss becomes enraged.

How to Use Purified Gem in Pokémon GO (Quick Scoop)

1. What Purified Gems Are

  • Special battle items for Shadow Raids , not for normal raids or Team GO Rocket grunts.
  • Their job is to subdue an enraged Shadow Raid Boss by lowering its boosted stats (attack and defense).
  • You can normally hold up to 10 Purified Gems at once.

Think of them as a “panic button” you press when the Shadow Boss powers up mid‑fight.

2. How to Get Purified Gems (Quick recap)

Even though you asked “how to use purified gem Pokémon GO,” usage makes more sense if you see the full loop.

  • Defeat Team GO Rocket Grunts, Leaders, or Giovanni to earn Shadow Shards as rewards.
  • When you collect 4 Shadow Shards , they are refined via the Shard Refiner into 1 Purified Gem.
  • After the first time (where you see a little in‑game explanation), this combining happens automatically once you have four shards.

3. Step‑by‑Step: How to Use Purified Gems in a Raid

Here’s the practical, in‑battle flow for how to use Purified Gem in Pokémon GO.

  1. Join a Shadow Raid
    • Purified Gems only work in 3★ and 5★ Shadow Raids where the boss can become enraged.
  1. Battle until the Boss Becomes Enraged
    • The Shadow Raid Boss becomes enraged after it loses around one‑third of its HP.
 * When enraged, it gains a big boost to attack and defense, and you’ll see it hit much harder.
  1. Watch for the Purified Gem Prompt
    • When the boss is enraged, an option/icon to use a Purified Gem appears on your battle screen.
 * This is the only time you can actually activate the item; it won’t show before that.
  1. Tap to Use the Gem
    • Tap the Purified Gem button; this will consume one gem and apply its effect to the boss.
 * The boss will be partially **subdued** , meaning its enraged buffs get reduced and it’s easier to damage and survive against.
  1. Stacking with Other Players
    • Each Trainer can use up to 5 Purified Gems in a single Shadow Raid.
 * The effect **stacks** : multiple Trainers using gems together will subdue the boss faster and more strongly.
  1. Continue the Fight and Finish the Raid
    • Keep attacking while the boss is subdued; if the enraged boost comes back and you still have gems, you can use more.
 * Once defeated, you proceed to the catch screen as usual, but the gem usage made reaching that point much easier.

4. Key Tips and Strategy (2024–2026 Context)

  • Save gems for harder bosses
    • Use them mainly on high‑tier Shadow Raids (like Shadow Legendaries), where the enraged phase can quickly wipe teams.
  • Coordinate in lobbies
    • If you’re raiding with friends, decide who uses gems first so you don’t over‑stack them too early.
  • Farm Shadow Shards regularly
    • Do daily or event‑boosted Team GO Rocket battles to keep a steady supply of Purified Gems, especially during Shadow Raid events.
  • Remember the inventory cap
    • If you sit at 10 gems, extra shards are essentially “wasted value” until you start spending the gems in raids.

5. Mini FAQ from Player Discussions

“Can I use Purified Gems in normal raids or against Rocket Leaders directly?”
No. They are only usable in Shadow Raids when the boss is enraged, not in standard raids or Rocket encounters.

“Do Purified Gems make catch rates better?”
Their primary role is to reduce the boss’s stats during battle; making it easier to beat is what indirectly improves your chances of reaching the catch screen.

“Is it worth using multiple gems in one raid?”
Yes, especially on tough 5★ Shadow Raids. The stacked effect from several Trainers can turn an almost impossible fight into a comfortable clear.

TL;DR : In Pokémon GO, you use a Purified Gem in a Shadow Raid only when the Shadow Raid Boss becomes enraged; tap the Purified Gem button that appears, and it will subdue the boss, with effects stacking if multiple Trainers use them.

Information gathered from public forums or data available on the internet and portrayed here.