Structure Cubic

Also known as the isometric system. All three axes are of equal length and intersect at right angles. Based on a square inner structure.

Crystal shapes include:

  • Cube (diamond, fluorite, pyrite)
  • Octahedron (diamond, fluorite, magnetite)
  • Rhombic dodecahedron (garnet, lapis lazuli rarely crystallises)
  • Icosi-tetrahedron (pyrite, sphalerite)
  • Hexacisochedron (pyrite).

Common Cubic Crystals:

Diamond
Gold
Silver
Spinel

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