Mineraldle
Puzzle #19 was graphite.
Graphite is a crystalline allotrope (form) of the element carbon. It consists of many stacked layers of graphene, typically in excess of hundreds of layers. Graphite occurs naturally and is the most stable form of carbon under standard conditions.
Read about it on Wikipedia →
What the record says
Puzzle 19 ran on 3 Aug 2026 and the answer was graphite, played with 6 guesses against 4 columns. On the record: Crystal system - hexagonal; Strunz group - native-elements; Elements - C; Named after - other.
Beyond the grid the record adds Formula - C; Mohs hardness - 1.5; Named after - writing.
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
- hexagonal
- Strunz group
- native-elements
- Elements
- C
- Named after
- other
Also on the record
- Formula
- C
- Mohs hardness
- 1.5
- Named after
- writing