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All Authors | PriceScope

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.
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.
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.

The amazing work of Bruce Harding; AKA Beryl | PriceScope

Bruce Harding Obituary - (1932 - 2017) - West Brookfield, MA - Worcester Telegram & Gazette Bruce L. Harding, 85West Brookfield - Bruce Lancaster Harding, 85, of West Brookfield passed away Tuesday, August 29, 2017 surrounded by his loved ones.
Bruce Harding Obituary - (1932 - 2017) - West Brookfield, MA - Worcester Telegram & Gazette Bruce L. Harding, 85West Brookfield - Bruce Lancaster Harding, 85, of West Brookfield passed away Tuesday, August 29, 2017 surrounded by his loved ones.
Bruce Harding Obituary - (1932 - 2017) - West Brookfield, MA - Worcester Telegram & Gazette Bruce L. Harding, 85West Brookfield - Bruce Lancaster Harding, 85, of West Brookfield passed away Tuesday, August 29, 2017 surrounded by his loved ones.

A Study of Colored Stone and Diamond Cutting Angles ...

by Bruce L.Harding, March 2005; presented at Antwerp. References 1. GIA Colored Stone Course (1975) 2. Soukup, E.J. (1962) Facet Cutter’s Handbook. Discuss on the Forum. Category: Colored Stones . View All articles by Bruce Harding. Bruce Harding. SEARCH AUTHORS. Compare Diamond Prices.
by Bruce L.Harding, March 2005; presented at Antwerp. References 1. GIA Colored Stone Course (1975) 2. Soukup, E.J. (1962) Facet Cutter’s Handbook. Discuss on the Forum. Category: Colored Stones . View All articles by Bruce Harding. Bruce Harding. SEARCH AUTHORS. Compare Diamond Prices.
by Bruce L.Harding, March 2005; presented at Antwerp. References 1. GIA Colored Stone Course (1975) 2. Soukup, E.J. (1962) Facet Cutter’s Handbook. Discuss on the Forum. Category: Colored Stones . View All articles by Bruce Harding. Bruce Harding. SEARCH AUTHORS. Compare Diamond Prices.

Bruce Harding on Fractioning of Color by a Gem | PriceScope

Bruce Harding (aka Beryl) wrote an article Fractioning of Color by a Gem showing an effect of dispersion where color components are progressively diverted from the spectrum, as in 'fractional distillation' or 'fractional crystallization' of liquids. Bruce demonstrates this effect on diamonds with multiple ray-tracing using DiamCalc software
Bruce Harding (aka Beryl) wrote an article Fractioning of Color by a Gem showing an effect of dispersion where color components are progressively diverted from the spectrum, as in 'fractional distillation' or 'fractional crystallization' of liquids. Bruce demonstrates this effect on diamonds with multiple ray-tracing using DiamCalc software
Bruce Harding (aka Beryl) wrote an article Fractioning of Color by a Gem showing an effect of dispersion where color components are progressively diverted from the spectrum, as in 'fractional distillation' or 'fractional crystallization' of liquids. Bruce demonstrates this effect on diamonds with multiple ray-tracing using DiamCalc software

Gem Faceting / Cutting | PriceScope

Bruce L. Harding, BSME(MSC)+++ B. beryl Shiny_Rock. Joined Nov 6, 2003 Messages 288. Jan 1, 2004 #8 . Figure 3 shows the handpiece turned over to examine the stone. You can take it ti a better light, examine it with a loupe, or show a friend - then go right back to work: no settings are disturbed. Think of this when looking at machines.
Bruce L. Harding, BSME(MSC)+++ B. beryl Shiny_Rock. Joined Nov 6, 2003 Messages 288. Jan 1, 2004 #8 . Figure 3 shows the handpiece turned over to examine the stone. You can take it ti a better light, examine it with a loupe, or show a friend - then go right back to work: no settings are disturbed. Think of this when looking at machines.
Bruce L. Harding, BSME(MSC)+++ B. beryl Shiny_Rock. Joined Nov 6, 2003 Messages 288. Jan 1, 2004 #8 . Figure 3 shows the handpiece turned over to examine the stone. You can take it ti a better light, examine it with a loupe, or show a friend - then go right back to work: no settings are disturbed. Think of this when looking at machines.

Is ''Optical Symmetry'' ''Needless Perfection ... - PriceScope

Bruce Harding posted the following response concerning a question on the USFG forum about a Hearts and Arrows scope. The purpose of a ''Hearts & Arrows'' scope, ''FireScope'' and ''Ideal Scope'', is to show two things: 1) Light-dark contrast between certain facets in a controlled lighting...
Bruce Harding posted the following response concerning a question on the USFG forum about a Hearts and Arrows scope. The purpose of a ''Hearts & Arrows'' scope, ''FireScope'' and ''Ideal Scope'', is to show two things: 1) Light-dark contrast between certain facets in a controlled lighting...
Bruce Harding posted the following response concerning a question on the USFG forum about a Hearts and Arrows scope. The purpose of a ''Hearts & Arrows'' scope, ''FireScope'' and ''Ideal Scope'', is to show two things: 1) Light-dark contrast between certain facets in a controlled lighting...

Recommended PriceScope RBC proportions - project to ...

But I am always reminded of my conversation when I first met Bruce Harding (who passed just over a year ago, sadly). He argued that my proportions were a bit on the shallow side based on his 1970's head obstruction work and G&G article (still way under valued). But when we discussed it he got the contrast bang bang concept - the scintillation ...
But I am always reminded of my conversation when I first met Bruce Harding (who passed just over a year ago, sadly). He argued that my proportions were a bit on the shallow side based on his 1970's head obstruction work and G&G article (still way under valued). But when we discussed it he got the contrast bang bang concept - the scintillation ...
But I am always reminded of my conversation when I first met Bruce Harding (who passed just over a year ago, sadly). He argued that my proportions were a bit on the shallow side based on his 1970's head obstruction work and G&G article (still way under valued). But when we discussed it he got the contrast bang bang concept - the scintillation ...

Fisheye and Nailhead | PriceScope

Fisheye's are too shallow and also direct a lot of the light toward the oservers head, just as a very deep diamond does. Sergey calls them Shallow nail heads. you can read a lot about this at www.cutstudy.com - there is an article by Bruce Harding (Beryl) there with a simple explanation and ray paths etc that he wrote in the 1970's.
Fisheye's are too shallow and also direct a lot of the light toward the oservers head, just as a very deep diamond does. Sergey calls them Shallow nail heads. you can read a lot about this at www.cutstudy.com - there is an article by Bruce Harding (Beryl) there with a simple explanation and ray paths etc that he wrote in the 1970's.
Fisheye's are too shallow and also direct a lot of the light toward the oservers head, just as a very deep diamond does. Sergey calls them Shallow nail heads. you can read a lot about this at www.cutstudy.com - there is an article by Bruce Harding (Beryl) there with a simple explanation and ray paths etc that he wrote in the 1970's.

Why do people say diamonds are not rarer than colored ...

Do any of you know who Bruce Harding was? Garry Holloway BSc FGAA DipDT Sparkliologist, Jeweller, HCA and Ideal-Scope Inventor HollowayDiamonds.com.au Ideal-Scope.com HollowayCutAdviser.com. Gloria27 Shiny_Rock. Premium. Joined Jul 21, 2015 Messages 399. May 8, 2020 #56
Do any of you know who Bruce Harding was? Garry Holloway BSc FGAA DipDT Sparkliologist, Jeweller, HCA and Ideal-Scope Inventor HollowayDiamonds.com.au Ideal-Scope.com HollowayCutAdviser.com. Gloria27 Shiny_Rock. Premium. Joined Jul 21, 2015 Messages 399. May 8, 2020 #56
Do any of you know who Bruce Harding was? Garry Holloway BSc FGAA DipDT Sparkliologist, Jeweller, HCA and Ideal-Scope Inventor HollowayDiamonds.com.au Ideal-Scope.com HollowayCutAdviser.com. Gloria27 Shiny_Rock. Premium. Joined Jul 21, 2015 Messages 399. May 8, 2020 #56

Grading the Princess Cut | PriceScope

AGS has given us cut-grading standards for Princess cuts. Designs having pavilions with 2 chevrons came first and, just recently, those with 3 and 4 chevrons. I prefer designs with minimum facets because they give stronger ‘bang-bang’ on-off reflections/contrast that attract the eye; they also take less time to cut and offer less chance of […]
AGS has given us cut-grading standards for Princess cuts. Designs having pavilions with 2 chevrons came first and, just recently, those with 3 and 4 chevrons. I prefer designs with minimum facets because they give stronger ‘bang-bang’ on-off reflections/contrast that attract the eye; they also take less time to cut and offer less chance of […]
AGS has given us cut-grading standards for Princess cuts. Designs having pavilions with 2 chevrons came first and, just recently, those with 3 and 4 chevrons. I prefer designs with minimum facets because they give stronger ‘bang-bang’ on-off reflections/contrast that attract the eye; they also take less time to cut and offer less chance of […]
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