Diamond Cut Study by Computer Methods

Developing of Diamond Cut Grading System by MSU (OctoNus and GC MSU)
Computer Tools

Thanks to Garry Holloway, FGAA, DipDT, Australia
for help during preparing this material

I. Introduction

There are two tasks in diamond cut study :

First, or direct, task. Creating a system of appraising the cut quality.
Second, or reverse, task. Creating an instrument or a methodology to grade a cut of real stones according to the above system by the cheapest and the most reliable way. The second task cannot be solved before the first one.

Some organizations are trying to solve the second task first so the market uses their appraising system and their instrument. It is not the way we want to follow.

Different methods of solving the reverse task presented at the market :

	Human-guided	Automatic
Analysis of diamond image taken with a structured lighting	FireScope	BrillianceScope
Measuring diamond proportions	Proportionscope	Sarin

The main part of this paper is devoted to analysis of possible solutions of the first task.


	The authors are: Sergey Sivovolenko, OctoNus Software, model and calculations Yurii Shelementiev, Gemology Center of MSU, gemology