Gemstones with asterism (stars)

Epiasterism = use reflected light
Diasterism = use transmitted light

Most frequently seen star gemstones

- Almandine garnet (4 / 6 / 12 rays: epiasterism / diasterism)
- Beryl (6 rays: epiasterism)
- Corundum (6 / 12 rays: epiasterism)
- Diopside (4 rays (epiasterism)
- Enstatite (4 / 8 rays: epiasterism)
- Moonstone (4 rays: epiasterism)
- Quartz (4 / 6 / 12 or more: diasterism / epiasterism)

Synthetic and imitation star stones

- Corundum doublet / triplet (6 rays: epiasterism)
- Synthetic corundum (6 rays: epiasterism)
- Inscribed base star (any: epiasterism)
- Opal triplet star (6 rays: epiasterism)
- Mirror-backed quartz (4 / 6 / 12 or more: epiasterism)
- Synthetic rutile (4 ray: epiasterism)