Basalt
At a glance
- Type
- Rock
- Group
- Igneous rock
- Crystal system
- None (a rock)
- Hardness
- Hard (5.5 to 7.5)
- Colour
- Grey, Black
- Lustre
- Dull
- Use
- Building
- Difficulty in WildGuessr
- Medium
Did you know?
- Basalt makes up most of the ocean floor, so it is the most common volcanic rock on Earth.
- Cooling basalt lava can crack into columns, as at Giant's Causeway (Northern Ireland) or Panská skála (Czechia).
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.
Similar stones
Classification, names and conservation status come from Wikidata (CC0), the photo from Wikimedia Commons. Wikidata Q43338 · All stones · All entries