FR606373A - Method and optical apparatus for recognizing natural fine pearls from false or cultured pearls - Google Patents

Method and optical apparatus for recognizing natural fine pearls from false or cultured pearls

Info

Publication number
FR606373A
FR606373A FR606373DA FR606373A FR 606373 A FR606373 A FR 606373A FR 606373D A FR606373D A FR 606373DA FR 606373 A FR606373 A FR 606373A
Authority
FR
France
Prior art keywords
pearls
false
optical apparatus
natural fine
cultured
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
Other languages
French (fr)
Inventor
Andre Rio
Lucien Levy
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 filed Critical
Application granted granted Critical
Publication of FR606373A publication Critical patent/FR606373A/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
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/38—Concrete; ceramics; glass; bricks
    • G01N33/381—Concrete; ceramics; glass; bricks precious stones; pearls
    • 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
FR606373D 1925-10-15 1925-10-15 Method and optical apparatus for recognizing natural fine pearls from false or cultured pearls Expired FR606373A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR606373T 1925-10-15

Publications (1)

Publication Number Publication Date
FR606373A true FR606373A (en) 1926-06-12

Family

ID=8974634

Family Applications (1)

Application Number Title Priority Date Filing Date
FR606373D Expired FR606373A (en) 1925-10-15 1925-10-15 Method and optical apparatus for recognizing natural fine pearls from false or cultured pearls

Country Status (1)

Country Link
FR (1) FR606373A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5146288A (en) * 1991-06-19 1992-09-08 Russell Kenneth M Pearl loupe
US5239354A (en) * 1991-06-19 1993-08-24 Russell Kenneth M Method and apparatus for the positive identification of a natural pearl and for measuring the thickness of the nacre coating of cultured pearls

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5146288A (en) * 1991-06-19 1992-09-08 Russell Kenneth M Pearl loupe
US5239354A (en) * 1991-06-19 1993-08-24 Russell Kenneth M Method and apparatus for the positive identification of a natural pearl and for measuring the thickness of the nacre coating of cultured pearls

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