Amber

Many telltale inclusions are microscopic. Some, like the 30-million year old ants in this piece of amber, are not. However, microscopes still allow viewers, whether professional gemologists, gem enthusiasts, or customers, to appreciate the inner world of gems. Photo by Michael Rhys. Licensed under CC By 2.0.

Article: The Microscope: A Guide for Gemologists

Credit: Michael Rhys