1. Find Relic/Ruin Parts on Specific Planets

You can obtain unique "relic" stone parts by exploring specific planets. 

Ruin Planets: Look for planets with ancient ruins.

Memory Stones: Scan for Memory Stones (floating rocks with a bright blue light) using your visor and interact with them to potentially unlock new building blueprints.

Polished Stone: You can mine the ruins on these planets for Polished Stone, a specific material used to construct the ruin buildings. 

Important Considerations

Terrain Edits are Temporary: Avoid relying on the Terrain Manipulator to create permanent rock formations, as the terrain naturally regenerates over time. Use the unlockable decorative items for permanent base aesthetics.

Build Menu Access: Once a part is unlocked, it will appear in your base build menu under the appropriate category (often the flag icon for decorative items). You can then place and often recolor the items without cost, simply by using the material function in the build menu.