Diamond Glossary R...

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A to Z of Diamonds Glossary

Diamonds Index

Round Brilliant Cut Diamond

A to Z of Diamonds Glossary
Alphabetical list of main words and terms relating to diamond or diamonds, containing over 600 entries, with definitions, explanations and links to more detailed information.

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Radiant Cut Radiant cuts combine the best of brilliant cuts, with a square emerald cut outline.
Rap, Rapaport Martin Rapaport produces the Rapaport Diamond Report, a monthly magazine, and the world's leading trade diamond price list, diamond & jewellery news and information source.
Ratner, Ratner's Trade mark owned by Signet Group PLC, owners of H. Samuel, Ernest Jones, and others.
Ray A thin line or narrow beam of light.
Red One of the rarest, and most desirable colours for diamond.
Red Cross A famous diamond, strangely enough it is yellow.
Reflection Important optical effect, whereby light bounces off a surface.
Refraction Important optical effect, the deviation of light when it passes from one medium to another, e.g. air to diamond. See Refractive Index.
Refractive Index, RI, R.I. A measure of the amount by which light will be refracted by a particular by a particular medium.
Rhodium, Rhodium Plating Rhodium is a highly reflective silvery precious metal, one of the platinum group of metals, often used to plate over "white" gold alloys to enhance their whiteness, in and around diamond settings. Not usually needed on platinum.
Rise and Fall of Diamonds Book by Edward Jay Epstein.
River Obsolescent colour grading term from the SCAN DN (Scandinavian) system, equivalent to D and E colours in the GIA scale.
Rough Rough is the word used to describe all uncut or unpolished diamonds.
RTZ, R.T.Z., Rio Tinto Zinc The third largest diamond prospecting company. Owns the Argyle mine in Western Australia, Diavik in Canada, & Murowa project in Zimbabwe.
Russia Russia overtook Botswana as the largest exporter of diamonds by volume in 2003. It's diamond production and trade figures were secret until recently.
Ryan Thompson Editor of the "Famous Diamonds" website (on tripod), still the best website about its subject, large and famous diamonds. Much copied by many commercial jewellers and would-be experts.

There are currently over 600 entries in this table.
Over 90 of them have page links to a page on this site. Eventually, we intend to add a more complete description for most entries, each on its own page. Please watch this space!

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Radiant Cut	Radiant cuts combine the best of brilliant cuts, with a square emerald cut outline.
Rap, Rapaport	Martin Rapaport produces the Rapaport Diamond Report, a monthly magazine, and the world's leading trade diamond price list, diamond & jewellery news and information source.
Ratner, Ratner's	Trade mark owned by Signet Group PLC, owners of H. Samuel, Ernest Jones, and others.
Ray	A thin line or narrow beam of light.
Red	One of the rarest, and most desirable colours for diamond.
Red Cross	A famous diamond, strangely enough it is yellow.
Reflection	Important optical effect, whereby light bounces off a surface.
Refraction	Important optical effect, the deviation of light when it passes from one medium to another, e.g. air to diamond. See Refractive Index.
Refractive Index, RI, R.I.	A measure of the amount by which light will be refracted by a particular by a particular medium.
Rhodium, Rhodium Plating	Rhodium is a highly reflective silvery precious metal, one of the platinum group of metals, often used to plate over "white" gold alloys to enhance their whiteness, in and around diamond settings. Not usually needed on platinum.
Rise and Fall of Diamonds	Book by Edward Jay Epstein.
River	Obsolescent colour grading term from the SCAN DN (Scandinavian) system, equivalent to D and E colours in the GIA scale.
Rough	Rough is the word used to describe all uncut or unpolished diamonds.
RTZ, R.T.Z., Rio Tinto Zinc	The third largest diamond prospecting company. Owns the Argyle mine in Western Australia, Diavik in Canada, & Murowa project in Zimbabwe.
Russia	Russia overtook Botswana as the largest exporter of diamonds by volume in 2003. It's diamond production and trade figures were secret until recently.
Ryan Thompson	Editor of the "Famous Diamonds" website (on tripod), still the best website about its subject, large and famous diamonds. Much copied by many commercial jewellers and would-be experts.