1988 Photomicrography Competition

Cyclonexanone oxalydihydrazone crystals

Spike Walker

Affiliation
Stafford College
Stafford, Staffordshire, United Kingdom
Technique
Rheinberg Illumination and Polarized Light
Magnification
12.5x

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

John I. Koivula

Affiliation
Gemological Institute of America
Carlsbad, California, USA
Technique
Brightfield
Magnification
14x

Fluorescien crystals

Norm Barker

Affiliation
Johns Hopkins School of Medicine
Baltimore, Maryland, USA
Technique
Polarized Light
Magnification
16x