BE879290A - Procede de determination de la couleur d'un diamant ou d'autres pierres precieuses - Google Patents

Procede de determination de la couleur d'un diamant ou d'autres pierres precieuses

Info

Publication number
BE879290A
BE879290A BE0/197549A BE197549A BE879290A BE 879290 A BE879290 A BE 879290A BE 0/197549 A BE0/197549 A BE 0/197549A BE 197549 A BE197549 A BE 197549A BE 879290 A BE879290 A BE 879290A
Authority
BE
Belgium
Prior art keywords
diamond
color
determining
precious stones
precious
Prior art date
Application number
BE0/197549A
Other languages
English (en)
French (fr)
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 BE879290A publication Critical patent/BE879290A/fr

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)
BE0/197549A 1978-10-09 1979-10-09 Procede de determination de la couleur d'un diamant ou d'autres pierres precieuses BE879290A (fr)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
BE879290A true BE879290A (fr) 1980-04-09

Family

ID=10500211

Family Applications (1)

Application Number Title Priority Date Filing Date
BE0/197549A BE879290A (fr) 1978-10-09 1979-10-09 Procede de determination de la couleur d'un diamant ou d'autres pierres precieuses

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
IL58344A (en) 1983-09-30
AU5150579A (en) 1980-04-17
DE2940625A1 (de) 1980-06-04

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: DE BEERS CONSOLIDATED MINES LTD

Effective date: 19971031