IL58344A - Method of assessing the colour of gems - Google Patents

Method of assessing the colour of gems

Info

Publication number
IL58344A
IL58344A IL58344A IL5834479A IL58344A IL 58344 A IL58344 A IL 58344A IL 58344 A IL58344 A IL 58344A IL 5834479 A IL5834479 A IL 5834479A IL 58344 A IL58344 A IL 58344A
Authority
IL
Israel
Prior art keywords
gems
assessing
colour
Prior art date
Application number
IL58344A
Other languages
English (en)
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 IL58344A publication Critical patent/IL58344A/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)
  • Spectrometry And Color Measurement (AREA)
IL58344A 1978-10-09 1979-09-27 Method of assessing the colour of gems IL58344A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
IL58344A true IL58344A (en) 1983-09-30

Family

ID=10500211

Family Applications (1)

Application Number Title Priority Date Filing Date
IL58344A IL58344A (en) 1978-10-09 1979-09-27 Method of assessing the colour of gems

Country Status (9)

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

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 (ja) * 1981-06-25 1983-01-05 Shimadzu Corp ダイヤモンドカラ−測定装置
JPS5830644A (ja) * 1981-08-14 1983-02-23 Ii R C:Kk 光軸を確定する方法
JPH0711488B2 (ja) * 1992-12-18 1995-02-08 株式会社泰光 カット面が形成された宝石の拡大視装置
FR2768513B1 (fr) * 1997-09-15 1999-12-03 Jean Pierre Delgrande Procede d'analyse colorimetrique comparative et dispositif correspondant
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 (de) * 1968-03-30 1974-04-04 Eickhorst, Manfred, 2000 Hamburg Vorrichtung zur Bestimmung der photometrischen Transmission geschliffener Diamanten
BE789234A (fr) * 1971-09-29 1973-01-15 Colorant Schmuckstein G M B H Procede et dispositif pour l'enregistrement des qualites de pierres de bijouterie
AT344419B (de) * 1973-03-20 1978-07-25 Dihaco Diamanten Handels Co Vorrichtung zur feststellung der bewertungsdaten von farbedelsteinen, insbesondere brillanten
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 (nl) 1983-02-25
NL189426B (nl) 1992-11-02
ZA795228B (en) 1980-09-24
CH644452A5 (en) 1984-07-31
JPS5598341A (en) 1980-07-26
NL7907348A (nl) 1980-04-11
FR2438837A1 (fr) 1980-05-09
AU527834B2 (en) 1983-03-24
NL189426C (nl) 1993-04-01
AU5150579A (en) 1980-04-17
BE879290A (fr) 1980-04-09
DE2940625A1 (de) 1980-06-04

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Legal Events

Date Code Title Description
KB Patent renewed