They were stolen by the gargoyles and had to be found. While re-buriable, they were essential in combination with the Vortex Cube to return the Codex of Ultimate Wisdom to the Ethereal Void.
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| Moonstones |
The Moonstones are very, very old artifacts. It is unknown from where they actually come, but they are bound to the phases of Britannia's twin moons, Trammel and Felucca. There are eight in existence, each representing a different moon phase. When a Moonstone is buried in the ground, a blue Moongate appears in that location at night, linked to the phase the Moonstone represents. Each Moonstone can be excavated and re-planted elsewhere, if the terrain is clear.
Cycles during the Month
| Day of Month | Time Range | Trammel | Felucca |
| 1 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM |  Moonglow | Moonglow |
| 2 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM | Moonglow |  Britain |
| 3 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM | Britain | Britain |
| 4 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM |  Jhelom | Jhelom |
| 5 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM |  Yew | Jhelom |
| 6 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM |  Minoc | Yew |
| 7 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM |  Trinsic | Yew |
| 8 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM |  Skara Brae | Minoc |
| 9 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM |  New Magincia | Trinsic |
| 10 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM | Moonglow | Trinsic |
| 11 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM | Moonglow | Skara Brae |
| 12 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM | Britain | Skara Brae |
| 13 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM | Jhelom | New Magincia |
| 14 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM | Yew | New Magincia |
| 15 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM | Minoc | Moonglow |
| 16 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM | Trinsic | Britain |
| 17 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM | Skara Brae | Britain |
| 18 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM | New Magincia | Jhelom |
| 19 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM | Moonglow | Jhelom |
| 20 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM | Moonglow | Yew |
| 21 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM | Britain | Yew |
| 22 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM | Jhelom | Minoc |
| 23 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM | Yew | Trinsic |
| 24 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM | Minoc | Trinsic |
| 25 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM | Trinsic | Skara Brae |
| 26 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM | Skara Brae | Skara Brae |
| 27 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM | New Magincia | New Magincia |
| 28 | 12:30 AM - 5:00 AM 8:00 PM - 11:30 PM | Moonglow | New Magincia |