Mineraldle
Puzzle #110 was malachite.
Malachite is a copper carbonate hydroxide mineral, with the formula Cu2CO3(OH)2. This opaque, green-banded mineral crystallizes in the monoclinic crystal system, and most often forms botryoidal, fibrous, or stalagmitic masses, in fractures and deep, underground spaces, where the water table and hydrothermal fluids provide the means for chemical precipitation. Individual crystals are rare, but occur as slender to acicular prisms.
Read about it on Wikipedia →
What the record says
Puzzle 110 ran on 2 Nov 2026 and the answer was malachite, played with 6 guesses against 4 columns. On the record: Crystal system - monoclinic; Strunz group - carbonates-nitrates; Elements - C, Cu, H, O; Named after - other.
Beyond the grid the record adds Formula - Cu₂(CO₃)(OH)₂; Mohs hardness - 3.75; Named after - Malva, peafowl.
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
- monoclinic
- Strunz group
- carbonates-nitrates
- Elements
- C, Cu, H, O
- Named after
- other
Also on the record
- Formula
- Cu₂(CO₃)(OH)₂
- Mohs hardness
- 3.75
- Named after
- Malva, peafowl