Photomicrographers

John I. Koivula

12th Place
1988 Photomicrography Competition

John I. Koivula

Gemological Institute of America
Carlsbad, California, USA

Subject Matter:

Inclusions of pyrolusite and limonite in a polished slab of Brazilian agate

- see: Agate (14x)
Technique:

Brightfield


see: brightfield