| Enstatite occurs in plutonic basic and ultrabasic rocks such as peridotite and norite, and also in some high-grade metamorphic rocks. |
| Orthopyroxene forms in primitive basalts but as differentiation proceeds, it is replaced by pigeonite once the enstatite component falls below 60 to 70 atomic percent. |
| In this connexion mention may be made of an altered form of enstatite or bronzite known as bastite or schiller-spar. |
| Other associated minerals include olivine, phlogopite, enstatite, and many other trace accessory minerals. |
| The Herbeira websterites contain diopside, enstatite, and pargasite with olivine, garnet, spinel, magnetite and ilmenite as minor phases. |
| Some of the characteristic minerals found in kimberlite are olivine, pyrope garnet, enstatite, diopside, ilmenite, phlogopite, perovskite, magnetite, and spinel. |
