SILEX
| Date | Clue |
|---|---|
| 2023-09-10 | Mineral used in glass production |
| 2021-07-22 | Finely ground quartz |
| 2020-10-30 | Heat-resistant glass |
| 2015-06-21 | Ingredient in glassmaking |
| 2011-02-05 | Mineral in the form of quartz or flint |
| 2010-05-09 | Proctor ___ (small appliance brand) |
| 2005-10-26 | Glass ingredient |
| 2004-01-16 | Proctor-___ (small appliance maker) |
| 1996-06-30 | Finely ground quartz used as paint filler |