Analysis Of Gem-Quality And Experimental Estimation Of Toleration Ranges In Geometrical Features Of Brilliant Type Cut DiamondsReport as inadecuate




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The measures that influence the quality of diamonds are cut, shape, colour, clarity andweight. These features are therefore of some economic significance. It has long been recognizedthat similar type diamonds with identical cuts are subject to some variability in geometricalfeatures that can give rise to differences in their quality. In the present study a brief review ispresented of previous investigations that looked at properties of diamonds. This is followed by anoverview of current practices in estimating the quality of diamonds with particular focus onbrilliant type cut diamonds. The results are presented with prominent dimensional features,namely, girdle diameter, table, crown, girdle width, pavilion and their corresponding angles thatwere measured on 12 stones, six in each of 2 sets, ‘as bought’ brilliant type cut diamonds fromone supplier. Variations in scatter and the mean value of each dimensional feature between thetwo sets of diamonds were estimated using relevant statistical methods. The results are discussedin the paper from both a qualitative and a quantitative point of view. It is suggested that this sortof information may be used to assist in assessing the quality of brilliants and selecting geometrically similar stones for jewels, when needed.

KEYWORDS

Diamonds, Brilliant Type Cuts, Statistical Analyses, Similarities and Differences, Gem Quality

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J. Audy, K. Audy and T. Haines -Analysis Of Gem-Quality And Experimental Estimation Of Toleration Ranges In Geometrical Features Of Brilliant Type Cut Diamonds,- Journal of Minerals and Materials Characterization and Engineering, Vol. 4 No. 2, 2005, pp. 95-106. doi: 10.4236-jmmce.2005.42009.





Author: J. Audy, K. Audy, T. Haines

Source: http://www.scirp.org/



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