| Clue | Source | Date |
|---|---|---|
| Opalescent gems | Eugene Sheffer | 22 Mar 2025 |
| Semi-transparent white gems with a blue tinge | The Times Specialist Sunday | 07 Feb 2021 |
| Opalescent gems popular in Art Nouveau | Universal | 17 Jul 2020 |
| Opalescent gems | ||
| Opalescent gems | ||
| Opalescent gems | ||
| Gems with a silvery play of color | ||
| Heavenly gems? | ||
| Certain Armstrong collections | ||
| Astronauts' finds | ||
| Translucent gems. |