Mineraldle
Puzzle #48 was phenakite.
Phenakite or phenacite is a fairly rare nesosilicate mineral consisting of beryllium orthosilicate, Be2SiO4. Occasionally used as a gemstone, phenakite occurs as isolated crystals, which are rhombohedral with parallel-faced hemihedrism, and are either lenticular or prismatic in habit: the lenticular habit is determined by the development of faces of several obtuse rhombohedra and the absence of prism faces. There is no cleavage, and the fracture is conchoidal.
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What the record says
Puzzle 48 ran on 1 Sep 2026 and the answer was phenakite, played with 6 guesses against 4 columns. On the record: Crystal system - trigonal; Strunz group - silicates; Elements - Be, O, Si; Named after - other.
Beyond the grid the record adds Formula - Beâ‚‚SiOâ‚„; Named after - fraud.
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
- silicates
- Elements
- Be, O, Si
- Named after
- other
Also on the record
- Formula
- Beâ‚‚SiOâ‚„
- Named after
- fraud