Eisillium was an extremely rare naturally-occurring mineral. Archer's Comet contained large quantities of eisillium, discovered in June of 2151 by the Earth starship Enterprise. (ENT: "Breaking the Ice")
| Identifier (URI) | Rank |
|---|---|
| dbkwik:resource/BdRfbafwQZod2aI_BjVjgA== | 5.88129e-14 |