CA997940A - Apparatus for evaluating coloured gems, particularly cut diamonds - Google Patents

Apparatus for evaluating coloured gems, particularly cut diamonds

Info

Publication number
CA997940A
CA997940A CA195,422A CA195422A CA997940A CA 997940 A CA997940 A CA 997940A CA 195422 A CA195422 A CA 195422A CA 997940 A CA997940 A CA 997940A
Authority
CA
Canada
Prior art keywords
gems
coloured
evaluating
cut diamonds
particularly cut
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
CA195,422A
Inventor
Gernot K. Bruck
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.)
DIHACO DIAMANTEN HANDELS ESTABLISHMENT Cie
Original Assignee
DIHACO DIAMANTEN HANDELS ESTABLISHMENT Cie
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
Priority claimed from DE19732313783 external-priority patent/DE2313783C3/en
Application filed by DIHACO DIAMANTEN HANDELS ESTABLISHMENT Cie filed Critical DIHACO DIAMANTEN HANDELS ESTABLISHMENT Cie
Application granted granted Critical
Publication of CA997940A publication Critical patent/CA997940A/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
    • G01N33/389—
CA195,422A 1973-03-20 1974-03-19 Apparatus for evaluating coloured gems, particularly cut diamonds Expired CA997940A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19732313783 DE2313783C3 (en) 1973-03-20 Device for determining the evaluation data of colored gemstones, in particular diamonds
DE19732344144 DE2344144C3 (en) 1973-09-01 Device for determining the evaluation data of colored gemstones, in particular diamonds

Publications (1)

Publication Number Publication Date
CA997940A true CA997940A (en) 1976-10-05

Family

ID=25764856

Family Applications (1)

Application Number Title Priority Date Filing Date
CA195,422A Expired CA997940A (en) 1973-03-20 1974-03-19 Apparatus for evaluating coloured gems, particularly cut diamonds

Country Status (7)

Country Link
US (1) US3867032A (en)
JP (1) JPS5617617B2 (en)
AT (1) AT344419B (en)
CA (1) CA997940A (en)
CH (1) CH568563A5 (en)
DK (1) DK139399C (en)
FR (1) FR2222651B1 (en)

Families Citing this family (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2444644A1 (en) * 1974-09-18 1976-04-08 Dihaco Diamanten Handels Co METHOD AND DEVICE FOR DETERMINING AND SIZING INCLUSIONS IN GEMSTONES
GB1566325A (en) * 1976-02-05 1980-04-30 Dihaco Diamanten Handels Co Process and apparatus for ascertaining data relating to the valuation of gems
CH607020A5 (en) * 1976-05-20 1978-11-30 Alusuisse
US4266871A (en) * 1978-07-28 1981-05-12 Gem Instruments Corporation Apparatus for visually duplicating gemstones
IL58344A (en) * 1978-10-09 1983-09-30 De Beers Cons Mines Ltd Method of assessing the colour of gems
US4291975A (en) * 1979-10-03 1981-09-29 Scientific Gem Identification, Inc. Apparatus for determining the color characteristics of a gem
US4417564A (en) * 1980-06-04 1983-11-29 Lawrence John C Centering and working gemstones
ZA813689B (en) * 1980-06-04 1982-07-28 Gersan Ets Centering and working gemstones
EP0042361A1 (en) * 1980-06-17 1981-12-23 GRETAG Aktiengesellschaft Method and device for machine identification of gem stones
JPS57156545A (en) * 1981-03-22 1982-09-27 Ii R C:Kk Identifying method for jewelry by measurement of optical system and data processor for it
JPS57158544A (en) * 1981-03-25 1982-09-30 Ii R C:Kk Identifying method of jewel and ornament by measurement of quantity system and optical system, and its data processor
JPS57169656A (en) * 1981-04-12 1982-10-19 Ii R C:Kk Examining method for jewel
JPS58728A (en) * 1981-06-25 1983-01-05 Shimadzu Corp Diamond color measuring device
US5184732A (en) * 1985-12-20 1993-02-09 Gersan Establishment Shape sorting
GB8531396D0 (en) * 1985-12-20 1986-02-05 Gersan Ets Sorting
JPS6247073Y2 (en) * 1986-06-09 1987-12-24
IT1211348B (en) * 1987-07-31 1989-10-18 Roggero Paolo E Trossarelli Ca ILLUMINATOR FOR SPECTROSCOPIC OBSERVATION OF MINERAL OSIMILE GEMS
JPH06103268B2 (en) * 1989-02-17 1994-12-14 金作 山下 Instrument for observing brilliance of jewels such as diamond and method for photographing jewels using the instrument
FR2656118B1 (en) * 1989-12-19 1992-12-11 Europ Propulsion OBSERVATION DEVICE FOR EXTERNALLY GLOSSY BODIES OF GENERAL SPHERICAL OR CURVED FORM.
JPH03231143A (en) * 1990-02-06 1991-10-15 Kinsaku Yamashita Method and apparatus for judging and measuring brightness of diamond
JPH06103269B2 (en) * 1990-07-06 1994-12-14 金作 山下 Observing or photographing gems such as diamonds and equipment
GB9210674D0 (en) * 1992-05-19 1992-07-01 Gersan Ets Method and apparatus for examining an object
JPH05332731A (en) * 1992-05-29 1993-12-14 Nikon Corp Form measuring device
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
US7105822B1 (en) * 2000-09-29 2006-09-12 American Gemological Laboratories, Inc. Characterization of clarity and color enhancement agents in gems
US7260544B1 (en) * 2000-10-12 2007-08-21 Gemological Institute Of America, Inc. System and methods for evaluating the appearance of a gemstone
FR2831031A1 (en) * 2001-10-23 2003-04-25 Dji Design Method for illuminating natural or synthetic precious stone, comprises electronically fed laser with beam which is directed at lowest extremity of stone and is housed within press fit stone mounting
ES2219483T3 (en) * 2001-12-13 2004-12-01 Overseas Diamonds Technologies N.V. DEVICE FOR GENERATING DATA TO DETERMINE A PROPERTY OF A PRECIOUS STONE AND PROCEDURES TO DETERMINE A PROPERTY OF A PRECIOUS STONE.
US6786733B2 (en) * 2002-10-15 2004-09-07 Overseas Diamonds Inc. Computer-implemented method of and system for teaching an untrained observer to evaluate a gemstone
US7102742B2 (en) 2004-01-12 2006-09-05 Gemological Institute Of America, Inc. Fluorescence measuring device for gemstones
US7315356B2 (en) * 2004-05-13 2008-01-01 Haske Martin D Fire demonstration tool and method for using thereof
DE102005039679A1 (en) * 2005-08-22 2007-03-08 Galatea Ltd. Method for determining the value of an object
US7800741B2 (en) * 2005-08-22 2010-09-21 Galatea Ltd. Method for evaluation of a gemstone
EP1969353A1 (en) * 2005-12-12 2008-09-17 Platform Development&Investment Ltd. Assessment of diamond color
US9262284B2 (en) * 2006-12-07 2016-02-16 Lenovo Enterprise Solutions (Singapore) Pte. Ltd. Single channel memory mirror
US20090234754A1 (en) * 2008-03-11 2009-09-17 Dave Lapa Apparatus, a method, and a system for gemstone evaluation and gemology tutoring over the internet
DE102009025561A1 (en) * 2009-06-12 2010-12-16 BAM Bundesanstalt für Materialforschung und -prüfung Arrangement and method for determining the luminescence quantum yield of a luminescent sample
SG2014012348A (en) * 2012-10-03 2014-08-28 Presidium Instr Pte Ltd A gemstone tester and a method of characterising a gemstone
AT514332B1 (en) * 2013-08-27 2014-12-15 Swarovski D Kg Arrangement for analyzing a light pattern caused by refraction and reflection on a gemstone
US10300546B2 (en) * 2017-01-27 2019-05-28 United Technologies Corporation Spherical articulating fixture
US11906437B2 (en) * 2017-12-21 2024-02-20 Università Degli Studi Di Milano - Bicocca Systems and methods for spectroscopic analyses of diamonds
US11333606B2 (en) * 2020-08-18 2022-05-17 Hong Kong Applied Science And Technology Research Institute Co., Ltd. Apparatus and method for visually inspecting gemstones
IT202100021218A1 (en) * 2021-08-05 2023-02-05 Diamsafe S R L METHOD AND DEVICE FOR UNIQUELY IDENTIFYING A FACETED GEMSTONE

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5015597Y1 (en) * 1969-08-24 1975-05-15
JPS5423270B1 (en) * 1970-03-13 1979-08-13

Also Published As

Publication number Publication date
DK139399C (en) 1979-07-23
JPS49123384A (en) 1974-11-26
ATA143274A (en) 1977-11-15
DK139399B (en) 1979-02-12
CH568563A5 (en) 1975-10-31
AT344419B (en) 1978-07-25
FR2222651A1 (en) 1974-10-18
FR2222651B1 (en) 1977-10-07
US3867032A (en) 1975-02-18
JPS5617617B2 (en) 1981-04-23

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