![Diagram of how calcite crystal birefringence works.](http://static.sciencelearn.org.nz/images/images/000/000/493/full/Calcite-crystal-birefringence20151103-6623-7vebx2.jpg?1674164389)
The calcite crytal lattice is a trigonal system. When text or an object is viewed through a clear calcite crystal, two images are seen. Light rays refract in two different ways as they pass through the crystal.
The calcite crytal lattice is a trigonal system. When text or an object is viewed through a clear calcite crystal, two images are seen. Light rays refract in two different ways as they pass through the crystal.