Mineraldle
Puzzle #45 was hoelite.
Hoelite is a mineral, discovered in 1922 at Mt. Pyramide, Spitsbergen, Norway and named after Norwegian geologist Adolf Hoel (1879–1964). Its chemical formula is C14H8O2 (9,10-anthraquinone).
What the record says
Puzzle 45 ran on 29 Aug 2026 and the answer was hoelite, played with 6 guesses against 4 columns. On the record: Crystal system - orthorhombic; Strunz group - organic-compounds; Elements - C, H, O; Named after - person.
Beyond the grid the record adds Formula - C₁₄H₈O₂; Named after - Adolf Hoel.
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
- orthorhombic
- Strunz group
- organic-compounds
- Elements
- C, H, O
- Named after
- person
Also on the record
- Formula
- C₁₄H₈O₂
- Named after
- Adolf Hoel