It occurs as fracture fillings and incrustations associated with diopside crystals. It can also occur in garnet, diopside and spinel. Under these conditions, new minerals like biotite, diopside and scapolite grew. The minerals that accompany them are calcite, epidote, vesuvianite, garnet, wollastonite, diopside and amphibole. Tremolite is an indicator of metamorphic grade since at high temperatures it converts to diopside. Grossular is found in contact metamorphosed limestones with vesuvianite, diopside, wollastonite and wernerite. Of these the former consists of orthoclase, nepheline, sodalite, diopside and aegirine, biotite and sphene. It occurs in retrograde metamorphic environment as fractures cutting garnet diopside skarn. Associated minerals include calcite, dolomite, grossular, wollastonite, talc, diopside, forsterite, cummingtonite, riebeckite and winchite. Grossular is found in skarns, contact metamorphosed limestones with vesuvianite, diopside, wollastonite and wernerite. At higher metamorphic grades, anthophyllite, enstatite, olivine and diopside dominate as the rock mass dehydrates. It is associated with various mixed iron-titanium oxides, graphite, analcime, diopside, ilmenite, phlogopite and rutile. Vesuvianite, wollastonite, garnet, diopside, willemite, johannsenite, margarosanite and clinohedrite also may be present. Bystrite occurs in lazurite deposits, and is usually associated with lazurite, calcite, and diopside. Associated minerals include rutile, spinel, clinohumite, perovskite, diopside, serpentine, forsterite, brucite, hydrotalcite, chlorite and calcite.