sharing our knowledge.
Photographic gallery.  Thousands of particles under the microscope.

Pleochroism

Hornblende

Hornblende Hornblende Hornblende Hornblende

Tourmaline

Tourmaline Tourmaline Tourmaline Tourmaline Tourmaline Tourmaline

Olivine

Sand, North Jetty Ocean Shores Sand, North Jetty Ocean Shores Sand, North Jetty Ocean Shores Sand, North Jetty Ocean Shores