Professional Jeweler Archive: Quartz Inclusions

January 2005

Merchandise / Photo Essay

Quartz Inclusions

A photo essay by John Koivula

In honor of the Gemstone of the Year focus on quartz, the Gemological Institute of America’s John Koivula graces the pages of Professional Jeweler with two of his favorite quartz inclusion microphotographs. Quartz is among Koivula’s favorite gems because of its rich diversity of inclusions.

Star of rutile crystallized from a hematite-ilmenite core in quartz from Governador Valadares, Minas Gerais, Brazil. Darkfield and fiber optic Illumination, 15x. Courtesy of Micro World of Gems.
Primary negative crystal fluid inclusions decorate the interior of an amethyst from Guererro, Mexico. Diffused, brightfield and fiber optic illumination, 10x.

About the Photographer

John Koivula has spent 43 years studying and photographing the microworld of gemstones. He is the author of The MicroWorld of Diamonds and coauthor of the Photoatlas of Inclusions in Gemstones; a contributor to the American Geological Institute’s Glossary of Geology, Robert Webster’s Gems and the Gemological Institute of America’s Diamond Dictionary; and author of more than 800 articles and notes on gemstone inclusions and related topics. With Dr. Eduard Gübelin, he is completing Photoatlas of Inclusions in Gemstones, Volume 2.

Koivula holds degrees in geology and chemistry; the gemological credentials G.G., C.G. and F.G.A.; and a fellowship in the Royal Microscopical Society. He serves on the executive board of the International Gemmological Conference, is an honorary life member of the Finnish Gemmological Society and the Gemmological Association of Great Britain; and was named one of the 64 most influential people of the 20th century in the jewelry industry by JCK magazine.

His awards include the Robert M. Shipley and Richard T. Liddicoat awards from the American Gem Society, the Scholarship Foundation Award from the American Federation of Mineralogical Societies and the Antonio C. Bonanno Award for Excellence in Gemology from the International Accredited Gemologists Association.

Copyright © 2005 by Bond Communications