| Clue | Source | Date |
|---|---|---|
| Mineral giving one backbone at beginning of Lent (6) | ||
| Magnesium aluminate (6) | ||
| Ruby look-alike | Wall Street Journal | 13 Jul 2024 |
| Red ___ (gemstone) | ||
| Rubylike gem | New York Times | 20 Mar 2022 |
| Mineral crystal found in Scots pine log | ||
| Rubylike gemstone | LA Times Daily | 12 Aug 2020 |
| Rubylike gemstone | The Washington Post | 12 Aug 2020 |
| Gemstone mined in Sri Lanka | ||
| Rubylike gem | The Washington Post Sunday | 03 Jun 2018 |
| Mineral used as a gem | Universal | 19 Feb 2016 |
| Rubylike gem | New York Times | 16 May 2015 |
| Rubylike gem | ||
| The Black Prince's Ruby is one | ||
| Mineral used as a gem | ||
| Rubylike gemstone | ||
| Mineral containing magnesium | ||
| Mineral used as a gem | ||
| Rubylike gemstone | ||
| Reddish mineral | ||
| Crystalline gemstone | ||
| Ruby ___ (gem) | ||
| Ruby variety | ||
| Red gem. | ||
| Ornamental stone | ||
| Kind of ruby. |