Research TrackGEM CHARACTERIZATION

Monday, October 8, 2018
1:30 PM - 3:00 PM
Sunset Ballroom


Overview

The Formation of Natural Type IIa and IIb Diamonds


Details

Recent studies of type II diamonds have revealed some rare inclusions and unexpected geological origins. One extraordinary group of superdeep diamonds consists of large, pure Cullinan-like “CLIPPIR” diamonds. The research findings show that high-quality type II diamonds come mainly from the sublithospheric mantle, a surprising result that refutes the notion that superdeep diamonds are small and low-quality.


Speakers

DR. CHRISTOPHER BREEDING

Manager Diamond Analytical

GIA Carlsbad

COLORED DIAMONDS: THE RARITY AND BEAUTY OF IMPERFECTION

Biography

Dr. Christopher Breeding is a senior research scientist at GIA in Carlsbad, California. His areas of expertise are diamond defects, treatments, and color origin; geochemistry of minerals; and gemology and mineralogy of colored stones. Dr. Breeding received a PhD in geology from Yale University.


DR. HAIM COHEN

Professor

Department Of Chemical Sciences, Ariel University

EVALUATING THE COLOR AND NATURE OF DIAMONDS VIA EPR SPECTROSCOPY

Biography

Dr. Haim Cohen is a professor in the Department of Chemical Sciences at Ariel University in Israel. He has been involved in the color treatment and spectroscopic analysis of diamonds since 1990. He is also the chief scientist of Dianer Diamonds Co., which is based in the Israel Diamond Bourse in Ramat Gan. Dr. Cohen holds a PhD from the Weizmann Institute of Science in Rehovot.


SERGEY SIVOVOLENKO

CEO

OctoNus Finland Oy

QUANTITATIVE ABSORPTION SPECTRUM RECONSTRUCTION FOR POLISHED DIAMOND

Biography

Sergey Sivovolenko is a leading designer of computer-aided tools for diamond processing. The company he chairs, OctoNus, produces technology capable of rough diamond planning and optimization, color mapping, scanning, and cut grading.


DR. EVAN SMITH

Researcher

GIA New York

THE FORMATION OF NATURAL TYPE IIA AND IIB DIAMONDS

Biography

Dr. Evan M. Smith is a research scientist at GIA who uses diamonds to explore the deep interior of the earth. As a leading expert in diamond geology, his research demonstrates that diamonds are some of the most scientifically valuable materials on our planet. Dr. Smith discovered that certain large and pure diamonds are formed at extreme depths, in pockets of molten metal. His work has been published in Science and Nature, and covered by The Washington Post, The Economist and National Public Radio. Dr. Smith holds a Ph.D. in geology from the University of British Columbia and is a former Liddicoat Postdoctoral Fellow.