| Familiar examples include nepheline, leucite, and members of the sodalite and cancrinite groups. |
| It has also been found in silica-poor igneous rocks, such as syenite, nepheline syenite, serpentinite, and lamprophyre. |
| Typical nepheline-dolerites are scarce, and consist of idiomorphic augite, surrounded by nepheline. |
| Finally, the eastern side of the mountain is mostly peralkaline nepheline syenites and porphyrites. |
| Additionally, lamproites may contain leucite, richterite, sanidine, and occasionally nepheline, whereas kimberlites do not. |
| The intermediate zone consists of massive lilac-gray sodalite with inclusions of nepheline, dark green aegirine, and pale green fluorapatite. |
