Mineraldle
Puzzle #103 was cinnabar.
Cinnabar, also called cinnabarite or mercurblende, is the bright scarlet to brick-red form of mercury(II) sulfide (HgS). It is the most common source ore for refining elemental mercury and is the historic source for the brilliant red or scarlet pigment termed vermilion and associated red mercury pigments.
Read about it on Wikipedia →
What the record says
Puzzle 103 ran on 26 Oct 2026 and the answer was cinnabar, played with 6 guesses against 4 columns. On the record: Crystal system - trigonal; Strunz group - sulfides-sulfosalts; Elements - Hg, S. 1 of the 4 columns is blank in the source (Named after), so nobody could score it either way.
Beyond the grid the record adds Formula - HgS; Mohs hardness - 2.3.
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
- trigonal
- Strunz group
- sulfides-sulfosalts
- Elements
- Hg, S
- Named after
- Not recorded
Also on the record
- Formula
- HgS
- Mohs hardness
- 2.3