Colour zonations in a "solid CO2-rich" diamond
Colour (and colourless) zonations in a so-called "solid CO2-rich" diamond. These colour zonations are not "graining" (plastic deformations). For now, the cause of this zoning is unknown, and the small inclusions, sometimes in the form of atolls, are also of unknown nature. These so-called "solid CO2-rich" diamonds are currently under study (see the publications of Dr. T. Hainschwang).
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A Defect Study and Classification of Brown Diamonds with Non-Deformation-Related Color.