Annual Winners

1992 Photomicrography Competition

19th Place
1992 Photomicrography Competition

John I. Koivula

Gemological Institute of America
Carlsbad, California, USA

Subject Matter:

Inclusions of rutile growing from a hematite core in Brazilian quartz

- see: Quartz, Mineral (14x)
Technique:

Darkfield


see: darkfield