FR617212A - Method for distinguishing Japanese pearls with mother-of-pearl core from natural fine pearls - Google Patents

Method for distinguishing Japanese pearls with mother-of-pearl core from natural fine pearls

Info

Publication number
FR617212A
FR617212A FR617212DA FR617212A FR 617212 A FR617212 A FR 617212A FR 617212D A FR617212D A FR 617212DA FR 617212 A FR617212 A FR 617212A
Authority
FR
France
Prior art keywords
pearls
mother
pearl core
natural fine
distinguishing
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
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 filed Critical
Application granted granted Critical
Publication of FR617212A publication Critical patent/FR617212A/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
FR617212D 1925-06-27 1926-06-08 Method for distinguishing Japanese pearls with mother-of-pearl core from natural fine pearls Expired FR617212A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEN24745D DE467054C (en) 1925-06-27 1925-06-27 Process for differentiating Japanese pearls with a mother-of-pearl core from real natural pearls

Publications (1)

Publication Number Publication Date
FR617212A true FR617212A (en) 1927-02-16

Family

ID=7343146

Family Applications (1)

Application Number Title Priority Date Filing Date
FR617212D Expired FR617212A (en) 1925-06-27 1926-06-08 Method for distinguishing Japanese pearls with mother-of-pearl core from natural fine pearls

Country Status (4)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Families Citing this family (5)

* 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
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
BE1015022A3 (en) * 2002-07-05 2004-08-03 Wetenschappelijk En Tech Onder Method and device for distinguished from stones.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Also Published As

Publication number Publication date
GB267462A (en) 1927-09-23
NL22672C (en)
GB254307A (en) 1927-09-29
DE467054C (en) 1928-10-18

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