Mineraldle
Puzzle #68 was talc.
Talc, or talcum, is a clay mineral composed of hydrated magnesium silicate, with the chemical formula Mg3Si4O10(OH)2. Talc in powdered form, often combined with corn starch, is used as baby powder. This mineral is used as a thickening agent and lubricant.
Read about it on Wikipedia →
What the record says
Puzzle 68 ran on 21 Sep 2026 and the answer was talc, played with 6 guesses against 4 columns. On the record: Crystal system - hexagonal; Strunz group - silicates. 2 of the 4 columns are blank in the source (Elements and Named after), so nobody could score them either way.
Beyond the grid the record adds Mohs hardness - 1.
Mineraldle builds its record from Wikidata - CC0 1.0. The description above comes from the same place the game credits on every reveal: English Wikipedia verbatim extract, CC BY-SA 4.0. The puzzle itself is still playable in the archive, and every answer that has been and gone is listed on the past-answers page.
How it scored
- Crystal system
- hexagonal
- Strunz group
- silicates
- Elements
- Not recorded
- Named after
- Not recorded
Also on the record
- Mohs hardness
- 1