Mineraldle
Puzzle #69 was bournonite.
Bournonite, also axotomous antimony glance, wheel ore, berthonite, volchite or dystomic glance (German: antimonbleikupferblende) is a sulfosalt mineral species, trithioantimoniate of lead and copper with the formula PbCuSbS3.
Read about it on Wikipedia →
What the record says
Puzzle 69 ran on 22 Sep 2026 and the answer was bournonite, played with 6 guesses against 4 columns. On the record: Crystal system - orthorhombic; Strunz group - sulfides-sulfosalts; Elements - Cu, Pb, S, Sb; Named after - person.
Beyond the grid the record adds Formula - CuPbSbS₃; Mohs hardness - 3; Named after - Jacques Louis de Bournon.
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
- sulfides-sulfosalts
- Elements
- Cu, Pb, S, Sb
- Named after
- person
Also on the record
- Formula
- CuPbSbS₃
- Mohs hardness
- 3
- Named after
- Jacques Louis de Bournon