Mineraldle
Puzzle #22 was aheylite.
Aheylite is a rare phosphate mineral with formula (Fe2+Zn)Al6[(OH)4|(PO4)2]2·4(H2O). It occurs as pale blue to pale green triclinic crystal masses. Aheylite was made the newest member of the turquoise group in 1984 by International Mineralogical Association Commission on New Minerals and Mineral Names.
What the record says
Puzzle 22 ran on 6 Aug 2026 and the answer was aheylite, played with 6 guesses against 4 columns. On the record: Crystal system - triclinic; Strunz group - phosphates-related; Elements - Al, Fe, H, O, P; Named after - person.
Beyond the grid the record adds Formula - Fe²⁺Al₆(PO₄)₄(OH)₈·4H₂O; Named after - Allen V. Heyl.
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
- triclinic
- Strunz group
- phosphates-related
- Elements
- Al, Fe, H, O, P
- Named after
- person
Also on the record
- Formula
- Fe²⁺Al₆(PO₄)₄(OH)₈·4H₂O
- Named after
- Allen V. Heyl