ZA813263B - The assessment of colour in diamonds and other gems - Google Patents

The assessment of colour in diamonds and other gems

Info

Publication number
ZA813263B
ZA813263B ZA00813263A ZA813263A ZA813263B ZA 813263 B ZA813263 B ZA 813263B ZA 00813263 A ZA00813263 A ZA 00813263A ZA 813263 A ZA813263 A ZA 813263A ZA 813263 B ZA813263 B ZA 813263B
Authority
ZA
South Africa
Prior art keywords
gems
diamonds
colour
assessment
Prior art date
Application number
ZA00813263A
Other languages
English (en)
Inventor
Woods Geoffrey Steward
Geoffrey Steward Woods
Original Assignee
De Beers Cons Mines Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by De Beers Cons Mines Ltd filed Critical De Beers Cons Mines Ltd
Publication of ZA813263B publication Critical patent/ZA813263B/xx

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/87—Investigating jewels

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Spectrometry And Color Measurement (AREA)
ZA00813263A 1980-06-04 1981-05-15 The assessment of colour in diamonds and other gems ZA813263B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8018288 1980-06-04

Publications (1)

Publication Number Publication Date
ZA813263B true ZA813263B (en) 1982-06-30

Family

ID=10513820

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00813263A ZA813263B (en) 1980-06-04 1981-05-15 The assessment of colour in diamonds and other gems

Country Status (6)

Country Link
EP (1) EP0041348B1 (xx)
JP (1) JPS5748642A (xx)
AU (1) AU547230B2 (xx)
DE (1) DE3174385D1 (xx)
IL (1) IL62964A0 (xx)
ZA (1) ZA813263B (xx)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8425274D0 (en) * 1984-10-05 1984-11-14 Spandrel Etab Signal responsive to parameter of objects
GB8531330D0 (en) * 1985-12-19 1986-01-29 British Petroleum Co Plc Differentiation process
GB8700917D0 (en) * 1987-01-16 1987-02-18 British Petroleum Co Plc Separation process
JPH06103268B2 (ja) * 1989-02-17 1994-12-14 金作 山下 ダイヤモンド等の宝石の輝き観察器具および該器具を用いた宝石の撮影方法
IL113829A (en) * 1995-05-23 2000-12-06 Nova Measuring Instr Ltd Apparatus for optical inspection of wafers during polishing
US5966673A (en) 1997-01-10 1999-10-12 Diamond Technologies, Inc. System and method for computerized evaluation of gemstones
US6473164B1 (en) 2000-02-16 2002-10-29 Gemological Institute Of America, Inc. Systems, apparatuses and methods for diamond color measurement and analysis
US7260544B1 (en) 2000-10-12 2007-08-21 Gemological Institute Of America, Inc. System and methods for evaluating the appearance of a gemstone
EP4332525A4 (en) 2021-04-28 2024-06-19 Sumitomo Electric Hardmetal Corp. METHOD FOR MEASURING THE NITROGEN CONCENTRATION IN A DIAMOND, AND DEVICE FOR MEASURING THE NITROGEN CONCENTRATION IN A DIAMOND

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2960909A (en) * 1957-01-07 1960-11-22 Jr Robert M Shipley Method for determination of color of gems
US3944368A (en) * 1973-07-11 1976-03-16 Beesley Casper R Apparatus for color analysis of precious stones
DE7418353U (de) * 1974-05-27 1974-10-17 Eickhorst M Vorrichtung zur spektroskopischen untersuchung von edelsteinen
GB2010474A (en) * 1977-10-19 1979-06-27 Horchler S Gem colour meter
IL58344A (en) * 1978-10-09 1983-09-30 De Beers Cons Mines Ltd Method of assessing the colour of gems
ZA795666B (en) * 1978-11-06 1980-10-29 Johnston R Reflectometer
JPS5617617A (en) * 1979-07-23 1981-02-19 Tokyo Tatsuno Co Ltd Filter net of strainer

Also Published As

Publication number Publication date
EP0041348A2 (en) 1981-12-09
EP0041348A3 (en) 1982-03-31
JPS5748642A (en) 1982-03-20
DE3174385D1 (en) 1986-05-22
AU547230B2 (en) 1985-10-10
IL62964A0 (en) 1981-07-31
EP0041348B1 (en) 1986-04-16
AU7132881A (en) 1981-12-10

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