1. 1 Travel to Vulcan.
2. 2 Locate a fragment of the crystal.
3. 3 Defeat the Nausicaan Thief.
4. 4 Return the crystal fragment to Sol.

Dashed boxes are real missions from stfc.space's own data that aren't in the stfc.club database yet (usually base-building objectives like "Upgrade Shipyard to Level 20").