| Clue | Source | Date |
|---|---|---|
| Shimmer, as an opal | Premier Sunday | 15 Aug 2021 |
| What soap bubbles do | New York Times | 01 Nov 2020 |
| Sparkle | New York Times | 02 Sep 2017 |
| Sparkle | ||
| Resemble mother-of-pearl | Wall Street Journal | 06 Mar 2015 |
| Resemble mother-of-pearl | ||
| Shine with a rainbow | ||
| Shimmer with rainbowlike colors | ||
| Display lustrous colors | ||
| Glitter | ||
| Flash like the rainbow. |