Diamond Calculator
Diamond 3D Book
Educational Programs
Testing Laboratory
Diamond Cut Study
Introduction
Recent achievements
Building of cut grading system
Work with scanned diamond models
Example with tilted table
BLResponses
Analysis of illumination
GIA's illumination model
"Brill" software analyses light response
WLR metric and brilliance
Example with mirrors
An observer model
Understanding of brilliance
Practical value of the cut grading system
Acknowledgment
References
  Acknowledgment  
 

We with to thank the following people without who our diamond cut studies would be absolutely impossible: Alexander Shevchenko (OctoNus, Russia), Olga Ohrimenko (Russia), Sergey Savrasov (MSU, Russia), Anton Vasiliev (Lal company, Russia), Bruce Harding (US), Michael Cowing (US), Leonid Tcharnyi (www.pricescope.com , Canada), Paul Van der Steen (DiamCad, Belgium), Michail Sherbakov (Alrosa, Russia), Eugenia Kyznetsova (MSU, Russia), Ilja Nikolaev (MSU, Russia), as well as active participants of discussions on diamond cut, which took place at the DiamondTalk.com forum. We wish to express special thanks to the group of diamond cut researchers from GIA and our other opponents who inspired us to deeply study the problems of diamond cut.

PS. Further development of these studies requires collaboration of specialists representing different areas of expertise. This is because the diamond cut studies are at the interface of many traditional sciences. Ray tracing is based on optics, physiology and psychology study the features of human vision and perception, respectively, computer modeling helps to make the diamond cut studies less expensive, marketing research is needed for practical applications, while gemology studies the diamond itself. That's why we are looking for colleagues and like-minded persons.

Efforts of researchers from different countries are now forming a new trend in gemology, which incorporates optical knowledge and modern methods of modeling. Our activities involve writing papers, creating web-sites, visiting web forums, and discussing various problems with colleagues and opponents. All these activities help to develop this new trend. We would like to intensify the exchange of knowledge between other parties interested in the problem and ourselves, because we consider this important for creating, developing, and disseminating new knowledge.

 
  References  
  1. Apenko M.I., Dubovik A.S. (1982) Applied Optics. Moscow, 352 pp. In Russian.

2. Born M., Wolf E. (1964). Principles of Optics. Pergamon Press.

3. Bruton E. (1981). Diamonds. Revised and reprinted edition, N.A.G. Press Ltd., London, pp. 226-227.

4. DODSON J.S. (1978). A statistical assessment of brilliance and fire for the round brilliant cut diamond. OPTICA ACTA, v.25, N.8, p.681-692 .

5. Fedotov N.T. (1939). General color science. State publishing house for science and technology, Moscow, 228 pages. In Russian.

6. Glassner A.S. (1995). Principles of Digital Image Synthesis. Vol. 1. Morgan Kaufmann Publishers, Inc., San Francisco, Ca. 540 pp.

7. Hemphill T.S., Reinitz I.M., Johnson M.L., Shigley J.E. (1998) Modeling the Appearance of the Round Brilliant Cut Diamond: An Analysis of Brilliance. Gems&Gemology, Fall 1998, Vol. XXXIV, No. 3, pp. 158-183.

8. Holloway G. (2001). Defining the Beauty and Desirability of Round Brilliant Diamonds. http://www.diamond-cut.com.au/09_brill.htm

9. Hubel D.H. (1988) Eye, Brain and Vision. Scientific American Library, A division of HPHLP, New York.

10. Judd D.B., Wyszecki G. (1975). Color in Business, Science and Industry. John Wiley&Sons, New York.

11. Liddicoat R.T. (Ed). (1993). The Diamond Dictionary. Third Edition, GIA, p. 28.

12. Lipson S.G., Lipson H., Tannhauser D.S. (1995). Optical Physics. Cambridge, University Press, 1995.

13. Novakovsky S.V. (1997). Color on a TV screen. Basics of television colorimetry, Moscow, Radio and communication. 168 pages. In Russian.

14. Pagel-Theisen V. (1993). Diamond Grading ABC. Handbook for Diamond Grading. 11th Edition, pp. 153 - 162.

15. Pribram K.H. (1975). Languages of the Brain. Moscow, Progress, 463 pp.

16. Reinitz I.M., Johnson M.L., Hemphill T.S., Gilbertson A.M., Guerts R.H., Green B.D., Shigley J.E. Modeling the Appearance of the Round Brilliant Cut Diamond: An Analysis of Fire, and More About Brilliance. Gems&Gemology, Vol. XXXVII, Fall 2001, pp. 174-197.

17. Sivovolenko S.B., Shelementiev Y.B., Vasiliev A.V. (1999). The results of diamond cut studies carried out in Moscow State University. http://www.gemology.ru/cut/english/document4.htm

18. Sivovolenko S.B., Shelementiev Y.B., Vasiliev A.V. (1999).Determination of the cut quality of a diamond and visual evaluation of its beauty. http://www.gemology.ru/cut/factor/index.htm

19. Sivovolenko S.B., Shelementiev Y.B. (2000). Developing of Diamond Cut Grading System by MSU (OctoNus and GC MSU) Computer Tools. http://www.gemology.ru/cut/english/comp/index.htm

20. Sharonov V.V. (1961). Light and color. State publishing house of physical and mathematical literature, Moscow, 311 pages. In Russian.

21. Tolkowsky M. (1919). Diamond Design. E & F.N. Spon, Ltd., London.

22. Vasiliev A. V., Rainbow in Colorless Gemstone., 1995, Acta Universitatis Wratislaviensis No 1607, Prace geologiczno-mineralogiczne XLIV, p.147. In Polish. http://www.gemology.ru/cut/english/rainbow/index.htm

23. Wyszecki G. Stiles W.S. (2000). Color Science. Concepts and Methods, Quantitative Data and Formulae // Brightness and Lightness scales, pp. 493-499.

 
  Authors :  
 

Sergey Sivovolenko, OctoNus, Moscow, Russia
Yuri Shelementiev, Gemological Center MSU, Moscow, Russia
Vladimir Onischuk, OctoNus, Moscow, Russia
Garry Holloway, Precious Metals, Melbourne, Australia

  
 

For correspondence: serg@next.msu.ru

  
© 2002 Sergey Sivovolenko, Yuri Shelementiev, Vladimir Onischuk, Garry Holloway