Foid Monzogabbro Hand Sample Photos. Click on any photo for a larger image. Some of the larger images may be on other web sites and will open in a new window.

Essexite Hand Sample

fmgbrhs_001. Essexite, a variety of nepheline monzogabbro from Mt. Johnson, Quebec, Canada. This sample is a dark gray gramular rock composed mainly of plagioclase feldspar, clinopyroxene, brown hornblende, and nepheline. Geologic Age is Late Paleozoic (post Lower Devonian).