MICAS
| Date | Clue |
|---|---|
| 2017-01-01 | Flaky minerals |
| 2008-07-18 | Biotite and lepidolite |
| 2007-12-28 | Fuchsite and alurgite |
| 2007-09-30 | Biotite and phlogopite |
| 2005-02-13 | Certain silicates |
| 2003-07-01 | Layered minerals |
| 2002-06-17 | Flaky minerals |
| 2002-03-23 | They're flaky |
| 1999-10-15 | They come in sheets |
| 1994-06-10 | Laminated rocks |