Hauyne forms part of lapis lazuli (opposite). Intergrown with other minerals, it is seldom found as individual crystals. Hauyne has perfect cleavage, making cutting difficult, so it is faceted primarily for collectors.

Haynes is found as small, rounded grains in volcanic rocks. Ancient volcanoes of Germany and Morocco are the best-known sources.

The name "grossular" is derived from the botanical name of the gooseberry, R. grossularia. Massive grossular garnet of a gooseberry-green colour was first discovered in the former USSR. Since then it has also been found in Hungary and Italy.