Stones
74 minerals, rocks, mineraloids and gems from WildGuessr, grouped by type. For each one you'll find its group, crystal system, hardness, colour and lustre, with a photo and two facts.
Mineral (50)
Mineraloid (4)
Rock (20)
Could you guess it from clues?
WildGuessr picks a secret animal, plant, fungus, stone, prehistoric creature or space object and you ask yes-or-no questions about it, such as its group or where it grows. The fewer clues you need, the more points you score.