GB183674A - An improved device for testing pearls - Google Patents

An improved device for testing pearls

Info

Publication number
GB183674A
GB183674A GB1672621A GB1672621A GB183674A GB 183674 A GB183674 A GB 183674A GB 1672621 A GB1672621 A GB 1672621A GB 1672621 A GB1672621 A GB 1672621A GB 183674 A GB183674 A GB 183674A
Authority
GB
United Kingdom
Prior art keywords
pearls
testing
improved device
improved
testing pearls
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
GB1672621A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1672621A priority Critical patent/GB183674A/en
Publication of GB183674A publication Critical patent/GB183674A/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
    • 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
GB1672621A 1921-06-17 1921-06-17 An improved device for testing pearls Expired GB183674A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1672621A GB183674A (en) 1921-06-17 1921-06-17 An improved device for testing pearls

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1672621A GB183674A (en) 1921-06-17 1921-06-17 An improved device for testing pearls

Publications (1)

Publication Number Publication Date
GB183674A true GB183674A (en) 1922-08-03

Family

ID=10082537

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1672621A Expired GB183674A (en) 1921-06-17 1921-06-17 An improved device for testing pearls

Country Status (1)

Country Link
GB (1) GB183674A (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

Similar Documents

Publication Publication Date Title
US1465259A (en) Dental apparatus
FR531515A (en) Desiccation device
GB183674A (en) An improved device for testing pearls
CA213959A (en) Testing device
CA211969A (en) Field coil testing device
CA210987A (en) Apparatus for taking test pieces
CA210912A (en) Magneto testing apparatus
CA211634A (en) Device for obtaining gold
CA207644A (en) Testing device for ignition systems
FR25434E (en) Measuring funnel
CA210609A (en) Specific gravity tester
CA202970A (en) Testing apparatus
CA210858A (en) Device for holding hayracks
CA212330A (en) Holding device
CA209463A (en) Ski-shaping device
CA224511A (en) Testing apparatus
CA217734A (en) Oil testing device
CA210245A (en) Measuring funnel
CA212081A (en) Agitating device
CA213997A (en) Level device
CA209719A (en) Laundry checking device
GB183529A (en) An improved shutter for kinematograph apparatus
CA237759A (en) Apparatus for testing engines
CA214215A (en) Anti-kicking device for cows
CA236785A (en) Testing device