Bruce Harding

Bruce Harding

Amateur gem cutter - EFMLS Lapidary Award 1975.Mechanical design engineer/mathematician. Completed all GIA & GAGB gemological courses 1974-80. Author: "Faceting Limits", Gems & Gemology, 1975, and "Diamond Design Revisited", now at Octonus website. Presenter at Diamond Cut Conference, Moscow, 2004.

Last 5 articles of this author

A Study of Colored Stone and Diamond Cutting Angles

Thu, 20 Jan 2011

Stones of different RI must be cut with different facet slopes for best appearance. Diamond cutters don’t realize this because they work with only one material, whose RI is 2.42. Colored stone RI’s vary from 1.5 to 2.3.

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Cutting Ovals

Tue, 14 Feb 2006

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