GB254307A - Method or process for distinguishing japanese pearls with a mother-of-pearl core from real natural pearls - Google Patents

Method or process for distinguishing japanese pearls with a mother-of-pearl core from real natural pearls

Info

Publication number
GB254307A
GB254307A GB15696/26A GB1569626A GB254307A GB 254307 A GB254307 A GB 254307A GB 15696/26 A GB15696/26 A GB 15696/26A GB 1569626 A GB1569626 A GB 1569626A GB 254307 A GB254307 A GB 254307A
Authority
GB
United Kingdom
Prior art keywords
pearl
pearls
change
mother
specific gravity
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
GB15696/26A
Other languages
English (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.)
RICHARD NACKEN
Original Assignee
RICHARD NACKEN
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 RICHARD NACKEN filed Critical RICHARD NACKEN
Publication of GB254307A publication Critical patent/GB254307A/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
    • G01N33/389—Precious stones; Pearls

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Farming Of Fish And Shellfish (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
GB15696/26A 1925-06-27 1926-06-22 Method or process for distinguishing japanese pearls with a mother-of-pearl core from real natural pearls Expired GB254307A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEN24745D DE467054C (de) 1925-06-27 1925-06-27 Verfahren zur Unterscheidung von Japanperlen mit Perlmutterkern gegenueber echten Naturperlen

Publications (1)

Publication Number Publication Date
GB254307A true GB254307A (en) 1927-09-29

Family

ID=7343146

Family Applications (2)

Application Number Title Priority Date Filing Date
GB15696/26A Expired GB254307A (en) 1925-06-27 1926-06-22 Method or process for distinguishing japanese pearls with a mother-of-pearl core from real natural pearls
GB15780/26A Expired GB267462A (en) 1925-06-27 1926-06-23 Apparatus for distinguishing japanese pearls with a mother-of-pearl core from real natural pearls

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB15780/26A Expired GB267462A (en) 1925-06-27 1926-06-23 Apparatus for distinguishing japanese pearls with a mother-of-pearl core from real natural pearls

Country Status (4)

Country Link
DE (1) DE467054C (enExample)
FR (1) FR617212A (enExample)
GB (2) GB254307A (enExample)
NL (1) NL22672C (enExample)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3183434A (en) * 1961-10-30 1965-05-11 Martin F Auer Universal rotation method and apparatus for locating axes in single spherical ferrimagnetic crystals
US3375438A (en) * 1966-08-08 1968-03-26 Army Usa Method and means for orienting crystals by alternate application of angularly spacedmagnetic fields
US3393359A (en) * 1960-04-27 1968-07-16 Creighton A Burk Apparatus including fluid support means for magnetic determination of core orientation

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2467562A (en) * 1943-06-21 1949-04-19 Thompson Prod Inc Method and apparatus for magnetically testing valves for sodium content
US5559436A (en) * 1994-11-21 1996-09-24 Marion Matthews Method and apparatus for distinguishing synthetic diamonds from natural diamonds
US6281680B1 (en) 1994-11-21 2001-08-28 Marion Matthews Method and apparatus for distinguishing synthetic diamonds from natural diamonds
BE1015022A3 (nl) 2002-07-05 2004-08-03 Wetenschappelijk En Tech Onder Werkwijze en inrichting voor het onderscheiden van edelstenen.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3393359A (en) * 1960-04-27 1968-07-16 Creighton A Burk Apparatus including fluid support means for magnetic determination of core orientation
US3183434A (en) * 1961-10-30 1965-05-11 Martin F Auer Universal rotation method and apparatus for locating axes in single spherical ferrimagnetic crystals
US3375438A (en) * 1966-08-08 1968-03-26 Army Usa Method and means for orienting crystals by alternate application of angularly spacedmagnetic fields

Also Published As

Publication number Publication date
DE467054C (de) 1928-10-18
FR617212A (fr) 1927-02-16
GB267462A (en) 1927-09-23
NL22672C (enExample)

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