Harzburgite main content.


Part of Hall of Planet Earth.


Exhibition Text

This harzburgite is one of the lowermost layers of the Stillwater Complex.  It is composed of green olivine and black orthopyroxene (bronzite).  The white mineral is plagioclase (labradorite), which crystallized in the interstices after the olivine and bronzite had accumulated.

AMNH collection

For Educators

Topic: Earth Science

Subtopic: Minerals and Resources

Keywords: Olivine, Geology, Stratigraphic, Plagioclase, Stillwater County (Mont.), Mineralogy

Audience: General