Internal Grain Center Diamond Inclusion Photography
Internal Grain Center (IntGr) inclusions (aka internal graining) are caused by irregular diamond crystal growth which creates internal distortions, waviness, and haze within a cut diamond.
Internal Trigons Grain Center Inclusions
All of the microscopic diamond inclusion photography on this page was generously contributed by the AGSL gemological testing laboratory in Las Vegas, Nevada, and is reproduced with their permission.
Diamond internal grain center inclusion photography by Joe Vanells, Director of Gem Services at AGSL. No reproduction without written permission from AGSL - All rights reserved.
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