Mineraldle
Puzzle #95 was aleksite.
Aleksite (IMA symbol: Alk) is a rare lead bismuth tellurium sulfosalt mineral with formula PbBi2Te2S2.
Read about it on Wikipedia →
What the record says
Puzzle 95 ran on 18 Oct 2026 and the answer was aleksite, played with 6 guesses against 4 columns. On the record: Crystal system - trigonal; Strunz group - sulfides-sulfosalts; Elements - Bi, Pb, S, Te. 1 of the 4 columns is blank in the source (Named after), so nobody could score it either way.
Beyond the grid the record adds Formula - PbBiâ‚‚Teâ‚‚Sâ‚‚; Mohs hardness - 2.
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
- trigonal
- Strunz group
- sulfides-sulfosalts
- Elements
- Bi, Pb, S, Te
- Named after
- Not recorded
Also on the record
- Formula
- PbBiâ‚‚Teâ‚‚Sâ‚‚
- Mohs hardness
- 2