GB660719A - Method of producing permanent modifications of the colour and other physical characteristics of gems - Google Patents

Method of producing permanent modifications of the colour and other physical characteristics of gems

Info

Publication number
GB660719A
GB660719A GB13986/49A GB1398649A GB660719A GB 660719 A GB660719 A GB 660719A GB 13986/49 A GB13986/49 A GB 13986/49A GB 1398649 A GB1398649 A GB 1398649A GB 660719 A GB660719 A GB 660719A
Authority
GB
United Kingdom
Prior art keywords
gem
transmutation
colour
physical characteristics
gems
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
GB13986/49A
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.)
MAURICE ELIE NAHMIAS
Original Assignee
MAURICE ELIE NAHMIAS
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 MAURICE ELIE NAHMIAS filed Critical MAURICE ELIE NAHMIAS
Publication of GB660719A publication Critical patent/GB660719A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21G—CONVERSION OF CHEMICAL ELEMENTS; RADIOACTIVE SOURCES
    • G21G1/00—Arrangements for converting chemical elements by electromagnetic radiation, corpuscular radiation or particle bombardment, e.g. producing radioactive isotopes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

660,719. Transmutation of elements. NAHMIAS, M. E. May 25, 1949 [May 31, 1948], No. 13986/49. Class 39 (iv). A method of treating a gem to effect a permanent change of its colour and other physical characteristics comprises subjecting the gem to the irradiation of a neutron flux having an energy and density high enough to effect transmutation of the impurities of the gem but not so high as to affect adversely the basic ingredient of the gem. The process may be applied to a diamond to change its colours or hardness; in this case neutrons of an energy less than 20 Mev. should be used to avoid transmutation of the carbon. The diamonds may be placed in a 1000 Kw. atomic pile and irradiated for a time between a few weeks and a year. The Specification as open to inspection under Sect. 91 suggests that diamonds may be used as a moderator for neutrons in an atomic pile. This subject-matter does not appear in the Specification as accepted.
GB13986/49A 1948-05-31 1949-05-25 Method of producing permanent modifications of the colour and other physical characteristics of gems Expired GB660719A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1009251T 1948-05-31

Publications (1)

Publication Number Publication Date
GB660719A true GB660719A (en) 1951-11-14

Family

ID=9568003

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13986/49A Expired GB660719A (en) 1948-05-31 1949-05-25 Method of producing permanent modifications of the colour and other physical characteristics of gems

Country Status (4)

Country Link
BE (1) BE489221A (en)
FR (1) FR1009251A (en)
GB (1) GB660719A (en)
NL (1) NL81096C (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2945793A (en) * 1952-09-22 1960-07-19 Dugdale Ronald Arthur Process for coloring diamonds
US2998365A (en) * 1954-04-19 1961-08-29 Ind Distributors 1946 Ltd Treatment of diamonds
US3012142A (en) * 1959-03-30 1961-12-05 Howard W Etzel High temperature dosimeter
US3075906A (en) * 1960-06-15 1963-01-29 Chow Ken-Tang Process for irradiating pearls and product resulting therefrom
US3293190A (en) * 1963-11-20 1966-12-20 Exxon Research Engineering Co Method for modifying the electrical and catalytic properties of a supported catalyst
EP0014528A1 (en) * 1979-01-17 1980-08-20 De Beers Industrial Diamond Division (Proprietary) Limited A method of reducing the colour of diamond

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2996763A (en) * 1956-01-31 1961-08-22 Gen Electric Diamond material
US3181933A (en) * 1961-02-28 1965-05-04 Gen Electric Radioactive diamond and process for the preparation thereof
FR2460119A1 (en) * 1979-06-29 1981-01-23 Inst Sinteza Mineralnogo Syr Changing the colouring of hard and gem stones - using high energy level rapid neutrons and gamma particles

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2945793A (en) * 1952-09-22 1960-07-19 Dugdale Ronald Arthur Process for coloring diamonds
US2998365A (en) * 1954-04-19 1961-08-29 Ind Distributors 1946 Ltd Treatment of diamonds
US3012142A (en) * 1959-03-30 1961-12-05 Howard W Etzel High temperature dosimeter
US3075906A (en) * 1960-06-15 1963-01-29 Chow Ken-Tang Process for irradiating pearls and product resulting therefrom
US3293190A (en) * 1963-11-20 1966-12-20 Exxon Research Engineering Co Method for modifying the electrical and catalytic properties of a supported catalyst
EP0014528A1 (en) * 1979-01-17 1980-08-20 De Beers Industrial Diamond Division (Proprietary) Limited A method of reducing the colour of diamond
US4399364A (en) 1979-01-17 1983-08-16 Trevor Evans Diamond treatment

Also Published As

Publication number Publication date
NL81096C (en)
FR1009251A (en) 1952-05-27
BE489221A (en)

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