Mineraldle
Puzzle #94 was ludwigite.
Ludwigite is a magnesium-iron borate mineral: Mg2FeBO5.
What the record says
Puzzle 94 ran on 17 Oct 2026 and the answer was ludwigite, played with 6 guesses against 4 columns. On the record: Crystal system - orthorhombic; Strunz group - borates; Elements - B, Fe, Mg, O; Named after - person.
Beyond the grid the record adds Formula - Mg₂Fe³⁺O₂(BO₃); Named after - Ernst Ludwig.
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
- borates
- Elements
- B, Fe, Mg, O
- Named after
- person
Also on the record
- Formula
- Mg₂Fe³⁺O₂(BO₃)
- Named after
- Ernst Ludwig