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Stones

Plagioclase

Plagioclase
Photo: Chmee2, CC BY-SA 3.0, Wikimedia Commons

At a glance

Type
Mineral
Group
Silicate
Crystal system
Triclinic
Hardness
Hard (5.5 to 7.5)
Density
Medium (2.5 to 3.2)
Occurs in
Igneous rocks, Metamorphic rocks
Foliation
Not layered
Colour
Colourless, White, Grey
Lustre
Glassy, Pearly
Use
Industry
Difficulty in WildGuessr
Hard

Did you know?

  • Its name comes from Greek words for oblique and break: its two cleavages meet at a slightly off right angle.
  • Plagioclase is one of the most abundant minerals in Earth's crust, and the Moon's pale highlands are rich in it.

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 Q714830 · All stones · All entries