New methods for photography through the microscope; application to gem materials

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Authors:Kinnunen, Kari A.
Author Affiliations:Primary:
Geological Survey of Finland, Espoo, Finland
Volume Title:Geological Survey of Finland, current research 1993-1994
Volume Authors:Autio, Sini, editor
Source:Geological Survey of Finland, current research 1993-1994, edited by Sini Autio. Special Paper - Geological Survey of Finland, Vol.20, p.185-187. Publisher: Geologian Tutkimuskeskus, Espoo, Finland. ISSN: 0782-8535. ISBN: 951-690-585-4
Publication Date:1995
Note:In English
Summary:New techniques are described for the photomicrography of macroscopic specimens in the natural state, including crystal faces and gold nuggets. An acetate peel is obtained from the cleaned surface of the specimen, and the peel is mounted and studied in transmitted light and photographed. Colour-filter shadowing is used to enhance the 3D aspects of the specimen. Examples are presented of the rhombohedral faces of amethyst crystals. The method has been applied to the identification of faked specimens and in criminological studies. [R.A.H.]
Subjects:Applications; Crystals; Gems; Microscope methods; Photography
Abstract Numbers:96M/1357
Record ID:1995068746
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom, Reference includes data from FINGEO, Geological Survey of Finland
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