Mineraldle
Puzzle #40 was turquoise.
Turquoise is an opaque, blue-to-green mineral that is a hydrous phosphate of copper and aluminium, with the chemical formula CuAl6(PO4)4(OH)8·4H2O. It is rare and valuable in finer grades and has been prized as a gemstone for millennia due to its hue.
Read about it on Wikipedia →
What the record says
Puzzle 40 ran on 24 Aug 2026 and the answer was turquoise, played with 6 guesses against 4 columns. On the record: Crystal system - triclinic; Strunz group - phosphates-related; Elements - Al, Cu, H, O, P; Named after - place.
Beyond the grid the record adds Formula - CuAl₆(PO₄)₄(OH)₈·4H₂O; Named after - Turkey.
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, Cu, H, O, P
- Named after
- place
Also on the record
- Formula
- CuAl₆(PO₄)₄(OH)₈·4H₂O
- Named after
- Turkey