Mineraldle
Puzzle #87 was ludlamite.
Ludlamite is a rare phosphate mineral with chemical formula (Fe,Mn,Mg)3(PO4)2·4H2O. It was first described in 1877 for an occurrence in Wheal Jane mine in Cornwall, England and named for English mineralogist Henry Ludlam (1824–1880).
What the record says
Puzzle 87 ran on 10 Oct 2026 and the answer was ludlamite, played with 6 guesses against 4 columns. On the record: Crystal system - monoclinic; Strunz group - phosphates-related; Elements - Fe, H, O, P; Named after - person.
Beyond the grid the record adds Formula - Fe²⁺₃(PO₄)₂·4H₂O; Named after - Henry Ludlam.
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
- monoclinic
- Strunz group
- phosphates-related
- Elements
- Fe, H, O, P
- Named after
- person
Also on the record
- Formula
- Fe²⁺₃(PO₄)₂·4H₂O
- Named after
- Henry Ludlam