Mineraldle
Puzzle #79 was adamsite-(Y).
Adamsite-(Y) (previously IMA 1999-020), chemical formula NaY(CO3)2·6H2O is a mineral of sodium, yttrium, carbon, oxygen, and hydrogen. It is named after Frank Dawson Adams (1859–1942), professor of geology, McGill University. Its Mohs scale rating is 3.
Read about it on Wikipedia →
What the record says
Puzzle 79 ran on 2 Oct 2026 and the answer was adamsite-(Y), played with 6 guesses against 4 columns. On the record: Crystal system - triclinic; Strunz group - carbonates-nitrates; Elements - C, H, Na, O, Y; Named after - person.
Beyond the grid the record adds Formula - NaY(CO₃)₂·6H₂O; Mohs hardness - 3; Named after - Frank Dawson Adams.
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
- carbonates-nitrates
- Elements
- C, H, Na, O, Y
- Named after
- person
Also on the record
- Formula
- NaY(CO₃)₂·6H₂O
- Mohs hardness
- 3
- Named after
- Frank Dawson Adams