ダイヤモンドの重量計算式について

概要

論文の詳細を見る
S.T.A.Currio (1986) summarized previously reported equations to calculate the weight of a round brilliant cut diamond. All these are appoximate equations, assuming limited conditions. We propose in this paper a new equation to evaluate the weight of a round brilliant cut more precisely, which is applicable to less limited conditions. the weight (ct) = 0.004853203×H・(D^2+D・T+T^2) -0.0007107349 ×T^2・(H-X_2)-0.0003694281×D^2・X_2+0.01380337×D^2・G-0.000004975073×D^3・((H・X_2)/(1.961571×(D -T)・X_2-0.1493155×D・H)+(P・Y)/(1.961571×D・Y-0.1493155×P・D)) +0.004853203×D^2・P-0.0003694279×D^2・Y X_2= (0.1522409×D・H・(D-T)+1.847759×H√<{(D-T)^2+3.414214×H^2}・U^2-0.03806023×D^2・H^2>)/(2×(D-T)^2+3.414214×H^2) Y=(1-(1.847759×L)/(√<D^2+3.414214×P^2>))・P In this equation, D is the diameter of the girdle, P is the depth of the pavilion, G is the thickness of the girdle, H is the height of the crown, U is the length between the vertical point of the star facet and the girdle, L is the length between the vertical point of the lower girdle facet and the vertical point of the pavilion and T is the diameter of the table in mm. This equation appears very complicated, but the calculalian is easy by the use of a calculator.
宝石学会(日本)の論文
1992-12-15