AU527834B2 - Assessment of colour in diamonds and other gems - Google Patents

Assessment of colour in diamonds and other gems

Info

Publication number
AU527834B2
AU527834B2 AU51505/79A AU5150579A AU527834B2 AU 527834 B2 AU527834 B2 AU 527834B2 AU 51505/79 A AU51505/79 A AU 51505/79A AU 5150579 A AU5150579 A AU 5150579A AU 527834 B2 AU527834 B2 AU 527834B2
Authority
AU
Australia
Prior art keywords
gems
diamonds
colour
assessment
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
AU51505/79A
Other versions
AU5150579A (en
Inventor
Christopher Mark Welbourn
Geoffrey Stewart Woods
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
De Beers Consolidated Mines Ltd
Original Assignee
De Beers Consolidated 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 Consolidated Mines Ltd filed Critical De Beers Consolidated Mines Ltd
Publication of AU5150579A publication Critical patent/AU5150579A/en
Application granted granted Critical
Publication of AU527834B2 publication Critical patent/AU527834B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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)
  • Spectrometry And Color Measurement (AREA)
AU51505/79A 1978-10-09 1979-10-05 Assessment of colour in diamonds and other gems Ceased AU527834B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7839847 1978-10-09
GB3984778 1978-10-09

Publications (2)

Publication Number Publication Date
AU5150579A AU5150579A (en) 1980-04-17
AU527834B2 true AU527834B2 (en) 1983-03-24

Family

ID=10500211

Family Applications (1)

Application Number Title Priority Date Filing Date
AU51505/79A Ceased AU527834B2 (en) 1978-10-09 1979-10-05 Assessment of colour in diamonds and other gems

Country Status (9)

Country Link
JP (1) JPS5598341A (en)
AU (1) AU527834B2 (en)
BE (1) BE879290A (en)
CH (1) CH644452A5 (en)
DE (1) DE2940625A1 (en)
FR (1) FR2438837A1 (en)
IL (1) IL58344A (en)
NL (1) NL189426C (en)
ZA (1) ZA795228B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA813263B (en) * 1980-06-04 1982-06-30 De Beers Cons Mines Ltd The assessment of colour in diamonds and other gems
JPS58728A (en) * 1981-06-25 1983-01-05 Shimadzu Corp Diamond color measuring device
JPS5830644A (en) * 1981-08-14 1983-02-23 Ii R C:Kk Method for deciding optical axis
JPH0711488B2 (en) * 1992-12-18 1995-02-08 株式会社泰光 A jewel magnifying device with a cut surface
FR2768513B1 (en) * 1997-09-15 1999-12-03 Jean Pierre Delgrande COMPARATIVE COLORIMETRIC ANALYSIS METHOD AND CORRESPONDING DEVICE
WO2019129238A1 (en) * 2017-12-29 2019-07-04 Goldway Technology Limited Diamond clarity measurement process and system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2992588A (en) * 1958-02-03 1961-07-18 Beckman Instruments Inc Photometer reflectance unit
DE1772105C2 (en) * 1968-03-30 1974-04-04 Eickhorst, Manfred, 2000 Hamburg Device for determining the photometric transmission of cut diamonds
BE789234A (en) * 1971-09-29 1973-01-15 Colorant Schmuckstein G M B H METHOD AND DEVICE FOR REGISTRATION OF THE QUALITIES OF JEWELERY STONES
AT344419B (en) * 1973-03-20 1978-07-25 Dihaco Diamanten Handels Co DEVICE FOR DETERMINING THE EVALUATION DATA OF COLORED GEMS, IN PARTICULAR DIAMONDS
ZA765149B (en) * 1976-08-27 1978-04-26 De Beers Ind Diamond Measurement of optical properties
JPS5378855A (en) * 1976-12-21 1978-07-12 Nec Corp Polygonal jewery identifying device

Also Published As

Publication number Publication date
FR2438837B1 (en) 1983-02-25
NL189426B (en) 1992-11-02
ZA795228B (en) 1980-09-24
CH644452A5 (en) 1984-07-31
JPS5598341A (en) 1980-07-26
NL7907348A (en) 1980-04-11
FR2438837A1 (en) 1980-05-09
NL189426C (en) 1993-04-01
IL58344A (en) 1983-09-30
AU5150579A (en) 1980-04-17
BE879290A (en) 1980-04-09
DE2940625A1 (en) 1980-06-04

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