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"Interpreting Diamond Morphology" - Part II
by Valentin Afanasiev, Nikolai Zinchuk,
Valeriy Sonin, Elena Semenets Rough Diamond Review, September 2004 The last post-magmatic stage of the kimberlite process has a lesser influence on the morphology of diamonds when compared to the pre- and syn- magmatic growth stages. These influences principally affect the surface of the diamonds and in some cases cause partial cracking. Trigons can be transformed through hexagonal forms into inverted trigons, while a tetrahexahedroidal shape can be formed at the same time. In one of the pipes of the Alakinskyi diamond field (Yakutia), surface alterations took place under the influence of hydrothermal fluids, which resulted from a sill intersecting the pipe. The sill altered the diamond morphology to a high degree, in some cases completely destroying the diamonds in contact zones of the sill. . . Read the complete article here . |
Informative Articles
Informative Articles
To keep you abreast of new discoveries in gemstone research, synthetics and treatments, we have listed a selection of informative articles written by experts in their field.
Check this page regularly for updates.
"European Gemological Laboratory Defines SI3"
Adding the SI3 clarity grade to the grading system was the next logical step.
'The Scoop on synthetics'
Can we ID them? Should we grade them? Do we need them?
'Cultured Confusion'
Should a man-made diamond be called "synthetic", or "cultured" and who are the important players in this controversial addition to the diamond industry?
"A Gemological Study of A Collection of Chameleon Diamonds"
The rarity of chameleon diamonds and their interest for the connoisseur are due to their unusual ability to change color temporarily when heated to about 150C, or after prolonged storage in the dark.
"Interpreting Diamond Morphology" - Part I
A diamond's morphological features reflect conditions of diamond formation and represent a unique characteristic than can be used to identify details of the sources of diamonds.
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