1992 Photomicrography Competition

Dinosaur bone

John I. Koivula

Affiliation
Gemological Institute of America
Carlsbad, California, USA
Technique
Brightfield
Magnification
15x

Dinosaur bone

Sinforoso Resultay

Affiliation
University of Calgary
Department of Geology & Geophysics
Calgary, Alberta, Canada
Technique
Polarized Light
Magnification
18x