THE GEMSTONE INCLUSION LIBRARY


[ Ruby ] [ Sapphire ] [ Emerald ] [ Diamond ] [ Opal ]
[ Alexandrite ] [ Glass ] [ Other ] [ Enhancements ] [ Composite ]

We have selected samples from C.I.G. 's comprehensive gem study collection which are difficult to identify. Most pictures were taken with an immersion-scope (methylene iodide or benzyl benzoate); under a common "dry" microscope with dark-field illumination many features shown here may not be visible. A detailed booklet with computer diskette containing over 100 micro-photographs is available from Gemlab Book Services . © 1996 J. W. Kuehn

104aGlass Doublet, with garnet top

104bGlass Doublet, same as above

505Ruby Doublet

520Sapphire Doublet, glue dyed blue

contentsINCLUSION INDEX