IRIDIUM
| Date | Clue |
|---|---|
| 2023-09-16 | Second-densest naturally occurring metal |
| 2013-01-22 | Metal between osmium and platinum on the periodic table |
| 2010-11-20 | Platinum-group element |
| 2007-07-27 | Metal in the points of gold pens |
| 2004-12-07 | Metal in surgical tools |
| 2004-11-07 | Corrosion-resistant metal |
| 1994-11-16 | Platinumlike metal |