Cordierite
compound
Mg2Al4Si5O18
A violet-blue mineral prized by gem cutters and used in heat-resistant ceramics
Vikings may have used this mineral as a natural polarising filter to navigate by the sun on cloudy days.
Material
Gallery canvas set in a solid wood floating frame.
Frame
White
$70.00
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See it on your wall
Shown true-to-size - a 8×10in piece scaled against real furniture.
Crystallography
| Catalogue identity | Cordierite — P6/mcc |
| Formula | Mg2Al4Si5O18 |
| Crystal system | orthorhombic |
| Space group | C c c m |
| Lattice (a, b, c) Å | 17.079, 9.73, 9.356 |
| Angles (α, β, γ) ° | 90, 90, 90 |
| Density (g/cm³) | 2.566 |
Structure data: Crystallography Open Database · Public domain (CC0)