GB2036360B - Assessment of colour in diamonds and other gems - Google Patents

Assessment of colour in diamonds and other gems

Info

Publication number
GB2036360B
GB2036360B GB7935018A GB7935018A GB2036360B GB 2036360 B GB2036360 B GB 2036360B GB 7935018 A GB7935018 A GB 7935018A GB 7935018 A GB7935018 A GB 7935018A GB 2036360 B GB2036360 B GB 2036360B
Authority
GB
United Kingdom
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.)
Expired
Application number
GB7935018A
Other versions
GB2036360A (en
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
Priority to GB7935018A priority Critical patent/GB2036360B/en
Publication of GB2036360A publication Critical patent/GB2036360A/en
Application granted granted Critical
Publication of GB2036360B publication Critical patent/GB2036360B/en
Expired 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
GB7935018A 1978-10-09 1979-10-09 Assessment of colour in diamonds and other gems Expired GB2036360B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7935018A GB2036360B (en) 1978-10-09 1979-10-09 Assessment of colour in diamonds and other gems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7839847 1978-10-09
GB7935018A GB2036360B (en) 1978-10-09 1979-10-09 Assessment of colour in diamonds and other gems

Publications (2)

Publication Number Publication Date
GB2036360A GB2036360A (en) 1980-06-25
GB2036360B true GB2036360B (en) 1982-10-13

Family

ID=26269123

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7935018A Expired GB2036360B (en) 1978-10-09 1979-10-09 Assessment of colour in diamonds and other gems

Country Status (1)

Country Link
GB (1) GB2036360B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4461568A (en) * 1981-06-10 1984-07-24 Welbourn Christopher M Assessing the color of gemstones and the like
JPS58728A (en) * 1981-06-25 1983-01-05 Shimadzu Corp Diamond color measuring device
JPS5892920A (en) * 1981-11-30 1983-06-02 Karuniyuu Kogaku Kogyo Kk Measuring device for diamond color
US4527895A (en) * 1983-01-25 1985-07-09 Gemdialogue Systems, Inc. Method of characterizing the colored appearance of a gemstone
US4534644A (en) * 1983-03-22 1985-08-13 Beesley Casper R Guides for color grading faceted gemstones
GB8700917D0 (en) * 1987-01-16 1987-02-18 British Petroleum Co Plc Separation process
US5143212A (en) * 1989-10-05 1992-09-01 K. G. Roberts & Associates, Inc. Gemstone color communication kits
US5182616A (en) * 1991-04-03 1993-01-26 K. G. Roberts & Associates Color communication kits
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

Also Published As

Publication number Publication date
GB2036360A (en) 1980-06-25

Similar Documents

Publication Publication Date Title
ZA803273B (en) Security container for diamonds and other precious stones
ZA806648B (en) Electrolyzer and process
JPS51117793A (en) Method of making aminoplast dispersion and its use
GB2002225B (en) Abrasive brushes and methods of making same
JPS5599901A (en) Polymer containing metal in form of complex and its manufacture
GB2036360B (en) Assessment of colour in diamonds and other gems
JPS5697444A (en) Dental article and method
IL62964A0 (en) Assessment of colour in diamonds and other gems
GB2044146B (en) Manufacture of diamond and like tools
AU527834B2 (en) Assessment of colour in diamonds and other gems
JPS5297399A (en) Pigment composition and method of making same
GB2011880B (en) Bauxitezirconia abrasive and products containing same
GB2058099B (en) Composition and process
PT74177A (en) Ornamental stone for trinkets and jewelry in general
JPS55142697A (en) Coloring of metal product and others
JPS5361647A (en) Materiallinnwater dispersion and method of making same
JPS5465674A (en) Ornamental material and making method thereof
GB2056058B (en) Assessing the colour of gemstones and the like
JPS5539319A (en) Ornamental material and its preparation
JPS55165743A (en) Polishing agent of bread and confectionery
JPS5314298A (en) Back scattering xxray reducing member and method of reducing said xxray using same
JPS5424081A (en) Inspector of material quality and like
ZA813689B (en) Centering and working gemstones
JPS5573543A (en) Tridimensional ornament material and making method thereof
JPS5586741A (en) Ornamental material and making method thereof

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19971009