US3585764A - Diamond cutting method - Google Patents

Diamond cutting method Download PDF

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Publication number
US3585764A
US3585764A US831973A US3585764DA US3585764A US 3585764 A US3585764 A US 3585764A US 831973 A US831973 A US 831973A US 3585764D A US3585764D A US 3585764DA US 3585764 A US3585764 A US 3585764A
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United States
Prior art keywords
facets
girdle
cutting
pavilion
culet
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 - Lifetime
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US831973A
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English (en)
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James Huisman
Harry Huisman
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Individual
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Individual
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    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C17/00—Gems or the like
    • A44C17/001—Faceting gems

Definitions

  • Swingle Attorney-Stoll and Stoll ABSTRACT A method of cutting a diamond to produce 72 pavilion facets comprising the steps of cutting four pavilion facets, then dividing the four into eight pavilion facets, then cutting the eight into 16 pavilion facets with substantially overlapping edges, then polishing the girdle to a 90 edge, then cutting a facet at 53 at each overlap and intermediate each overlap, then dividing each such latter facet into three facets such that each latter facet is provided with a diamond shape, and then cutting 38 facets into the girdle.
  • the present invention provides an entirely novel method of making a diamond having 72 pavilion facets and 38 girdle facets.
  • One of the novel aspects of the method herein described and claimed is the making of facets with overlapping intermediate side edges, the overlap being an entirely new step. Also among the novel features of the method herein described and claimed is the intermediate girdle thickening and polishing step which not only provides a relatively thick girdle as opposed to the thin girdle of the brilliant cut but also promotes through the making of girdle facets the extraordinary fire and brilliance of the resulting gem.
  • FIG. I is a bottom view ofa diamond after four facets have been cut into the pavilion.
  • FIG. 2 is a side view of the stone of FIG. I.
  • FIG. 3 is a bottom view showing eight facets cut into the pavilion.
  • FIG. 4 is a side view of the stone of FIG. 3.
  • FIG. 5 is a bottom view of a 24 facet pavilion which is developed from the pavilion of FIG. 3 by dividing each facet of the latter into three facets with two new and overlapping facets together with a portion of the original facet.
  • the three facets are not necessarily equal in size or shape.
  • FIG. 6 is a side view of the stone of FIG. 5.
  • FIG. 7 is a bottom view ofa 4O facet pavilion created by the formation of 16 overlapping facets adjacent the girdle.
  • FIG. 8 is a side view of the stone of FIG. 7.
  • FIG. 9 is a bottom view of a 72 facet pavilion.
  • FIG. I0 is a side view of the stone of FIG. 9.
  • FIG. 11 is an enlarged fragmentary view ofa faceted girdle.
  • FIG. 12 is a side view of a girdle-polishing machine, partly in phantom.
  • FIG. I3 is a bottom view of a modified stone produced in accordance with the method of the present invention in which the pavilion has 88 facets.
  • FIG. 14 is a side view of the stone of FIG. I3.
  • the first step of the method produces the four substantially triangular pavilion facets shown in FIGS. I and 2.
  • the second step of the method comprises dividing each of the aforesaid four facets in half to yield the eight substantially triangular pavilion facets shown in FIGS. 3 and 4.
  • the third step in the method is the cutting of each of the eight pavilion facets into a substantially trifurcated configuration in which two new facets l8 adjoining the girdle I5 are cut with an overlapping intermediate side edge 20.
  • Overlapping side edge 20 begins at a point approximately two-thirds of the way up from apex l0 and continues to girdle I5. If facets I8 did not overlap but met only at girdle 15, they would be substantially triangular; the result of overlapping at intersection 20 is that each facet I8 has an abridged triangular configuration as shown.
  • the fourth step in the method is the polishing of girdle 15 to a edge; that is, girdle 15 is polished to an annular ring concentric with and having its side edge parallel to the longitudinal axis of the stone. It is this step, inter alia, which is entirely different from any method known to the art heretofore. Prior methods involved the production of thin girdles and polishing, if any, was reserved as a last step.
  • the present invention provides this intermediate step of polishing the girdle into a relatively broad member capable, as will be seen, of receiving cut facets.
  • the fifth step of the method is the cutting of a facet 30 adjacent girdle I5 at each overlapping side edge 20 and intermediate'each overlapping side edge 20 at an approximate 53 angle yielding l6 abutting facets with overlapping intermediate side edges 31.
  • the sixth step of the method of the present invention is the cutting of each facet 30 by two triangular facets 40, the height of which is coextensive with the height of each overlapping side edge 3] and the hypotenuse of which extends from the top of each such overlapping side edge 31 to girdle I5 centrally of facet 30.
  • Each facet 30 is thereby cut into a diamond shape.
  • Triangular facets 40 are cut at an angle of 5860.
  • the last step of the method is the cutting ofgirdle I5 into 38 facets as shown in FIG. 11. Due to pavilion facets 40, the girdle facets are trapezoidal and rectangular, there being two adjacent trapezoidal facets and one rectangular facet in series.
  • girdle I5 although polished in the fourth step of the method and faceted in the last step, nevertheless appears relatively thin. A primary reason is that when facets are cut adjacent the girdle such as in the fifth and sixth steps, they may be cut partially into the girdle thereby reducing the girdle's thickness from that resulting from the fourth step polishing.
  • the stone shown in FIGS. 13 and I4 is the result ofa slight modification to facets 30 as previously cut in accordance with the present invention.
  • a further step is the division of each facet 30 into substantially similar halves 30a whereby the pavilion, excluding apex or culet 10, has 88 facets.
  • FIG. [2 is a representation of a girdle polishing machine such as may be utilized in the cutting and polishing of girdle 15.
  • Cutting and polishing wheel 50 is, of course, a diamond wheel and the jaws which hold the diamond are rotationally driven either continuously to produce the polished facet in the third step of the method or intermittently to produce the faceted girdle of the last step of the method.
  • the girdle polishing machine provides several unique advantages not heretofore attainable.
  • the first advantage is an ability to accurately cut stones weighing as little as 5 points (l/20 of a carat) which represents a marked advance over earlier methods which could make practical use of stones no smaller than 20 points 1/5 of a carat).
  • Another advantage is the ability to cut the final facets at relatively deep angles.
  • a method of cutting diamonds and other stones having pavilion, girdle and cutlet comprising the steps of:
  • said overlapping intermediate side edge extends from the girdle to approximately two-thirds of the distance to the culet.
  • said 38 facets comprise trapezoidal and rectangular facets.
  • said 38 facets comprise trapezoidal and rectangular facets in repeating series of two trapezoidal and one rectangular facet per series.

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  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Adornments (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
US831973A 1969-06-10 1969-06-10 Diamond cutting method Expired - Lifetime US3585764A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US83197369A 1969-06-10 1969-06-10

Publications (1)

Publication Number Publication Date
US3585764A true US3585764A (en) 1971-06-22

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US831973A Expired - Lifetime US3585764A (en) 1969-06-10 1969-06-10 Diamond cutting method

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US (1) US3585764A (xx)
AT (1) AT302092B (xx)
BE (1) BE751146A (xx)
CA (1) CA930553A (xx)
CH (1) CH504276A (xx)
DE (2) DE2025689A1 (xx)
ES (1) ES380369A1 (xx)
FR (1) FR2052468A5 (xx)
GB (1) GB1306854A (xx)
LU (1) LU61003A1 (xx)
NL (1) NL7007322A (xx)
ZA (1) ZA703524B (xx)

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4083352A (en) * 1977-01-28 1978-04-11 Dmetro Andrychuk Method for cutting ornamental transparent gemstones and products produced therefrom
US4372042A (en) * 1980-09-12 1983-02-08 Diamagnetics, Inc. Method for manufacturing diamond pick-up stylus
US5044123A (en) * 1990-03-22 1991-09-03 Douglas Hoffman Concave-convex faceting method and apparatus
US5072549A (en) * 1986-09-22 1991-12-17 Harold Johnston Method of cutting gemstones and product
US5437167A (en) * 1994-05-12 1995-08-01 Ambar; Betzalel Invisible setting for round diamond stone
US5462474A (en) * 1994-05-24 1995-10-31 Ronald W. Swager Method of facetting a gem
US5761929A (en) * 1996-09-12 1998-06-09 M. Fabrikant & Sons, Ltd. Facet cut structure for colored stones to enhance brilliance
US6305193B1 (en) 2000-10-17 2001-10-23 Continental Jewelry (Usa) Inc. Gemstone
US6397832B1 (en) * 1998-06-17 2002-06-04 Naotake Shuto Diamond cutting method and new-cut diamond shape
US6401489B1 (en) 2001-02-12 2002-06-11 Continental Jewelry (Usa), Inc. Gemstone
US6422039B2 (en) * 2000-07-20 2002-07-23 D. Swarovski & Co. Gem
US6578380B1 (en) 2002-01-24 2003-06-17 Diaco Hexagonal brilliant cut diamond
US6591827B2 (en) * 2001-06-25 2003-07-15 Roy Fuchs Method for preparing a diamond
US6604382B2 (en) 2000-11-07 2003-08-12 Naotake Shuto New-cut diamond shape
US6615611B1 (en) 2000-09-26 2003-09-09 Michael Schachter High yield diamond
US6668585B1 (en) * 2000-11-13 2003-12-30 David Markowitz Multi-faceted combined cut gemstones
US6694778B2 (en) * 2000-08-25 2004-02-24 Hohoemi Brains, Inc. Cut design of diamond for ornamental use
US6698239B2 (en) 2001-02-23 2004-03-02 Samuel Aaron, Inc. Brilliant cut diamond
US6745596B2 (en) 2001-05-31 2004-06-08 Samuel Aaron, Inc. Princess cut diamond
US6761044B2 (en) 2002-04-11 2004-07-13 Premier Gem Corp Gemstone cut
US20050252241A1 (en) * 2004-05-13 2005-11-17 Israel Oster Diamond cut
US20060137674A1 (en) * 2003-02-13 2006-06-29 Takeshi Aoyagi Diamond cutting method and diamond provided by the method
WO2006085645A1 (ja) * 2005-02-14 2006-08-17 Imagine Ltd. 宝石
US20090308104A1 (en) * 2008-06-16 2009-12-17 Morris Gad Gemstone cut
US20110000259A1 (en) * 2007-12-14 2011-01-06 Strnad Iii Leonard J Gemstone and method for cutting the same
WO2014011124A1 (en) * 2012-07-12 2014-01-16 Surasith Sriorathaikul Diamond-cut enamel
US20150201720A1 (en) * 2012-10-12 2015-07-23 D. Swarovski Kg Cut for gemstone
US9226554B2 (en) 2014-05-12 2016-01-05 Yoshihiko Kodama Circular cut diamond
US10405618B1 (en) * 2016-09-27 2019-09-10 Brian Steven Gavin Maximum light performance gemstone cutting technique
USD899294S1 (en) * 2018-07-16 2020-10-20 Diarough Nv Faceted gemstone

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3202302C2 (de) * 1982-01-26 1984-01-26 Atelier-Juwel Georg Bunz, 7544 Dobel Geschliffener Edelstein, insbesondere Diamant
DE19734036A1 (de) * 1997-08-06 1999-02-11 Helmut Buerger Verfahren zur Festlegung eines Edelsteinschliffs mit hoher Reflektion, Verfahren zum Schleifen eines Edelsteins mit hoher Reflektion sowie geschliffener Edelstein mit hoher Reflektion
AU2008346039B2 (en) 2008-01-09 2012-12-20 Hohoemi Brains, Inc. Ornamental diamond having two-stage pavilion
CN107080335B (zh) * 2017-06-22 2018-12-07 贺承阳 内部呈现偶数箭钻石的底部、钻石的加工方法及其钻石

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US809531A (en) * 1904-05-03 1906-01-09 Ernest G H Schenck Diamond.
US2340659A (en) * 1943-05-05 1944-02-01 Goldstein Edward Precious stone
US2364031A (en) * 1944-07-21 1944-11-28 Patented Diamond Inc Brilliant type diamond and method of cutting the same
US2579666A (en) * 1948-03-20 1951-12-25 Jewel Smiths Inc Diamond cutting machine
US2654979A (en) * 1950-08-29 1953-10-13 Grodzinski Paul Method of and device for producing specifically oriented polished faces on diamonds
US3286486A (en) * 1964-01-10 1966-11-22 Huisman James Diamond with specially faceted pavilion
US3394692A (en) * 1964-01-31 1968-07-30 Sirakian & Fils C Cutting and assembly of precious stones

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US809531A (en) * 1904-05-03 1906-01-09 Ernest G H Schenck Diamond.
US2340659A (en) * 1943-05-05 1944-02-01 Goldstein Edward Precious stone
US2364031A (en) * 1944-07-21 1944-11-28 Patented Diamond Inc Brilliant type diamond and method of cutting the same
US2579666A (en) * 1948-03-20 1951-12-25 Jewel Smiths Inc Diamond cutting machine
US2654979A (en) * 1950-08-29 1953-10-13 Grodzinski Paul Method of and device for producing specifically oriented polished faces on diamonds
US3286486A (en) * 1964-01-10 1966-11-22 Huisman James Diamond with specially faceted pavilion
US3394692A (en) * 1964-01-31 1968-07-30 Sirakian & Fils C Cutting and assembly of precious stones

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4083352A (en) * 1977-01-28 1978-04-11 Dmetro Andrychuk Method for cutting ornamental transparent gemstones and products produced therefrom
US4372042A (en) * 1980-09-12 1983-02-08 Diamagnetics, Inc. Method for manufacturing diamond pick-up stylus
US5072549A (en) * 1986-09-22 1991-12-17 Harold Johnston Method of cutting gemstones and product
US5044123A (en) * 1990-03-22 1991-09-03 Douglas Hoffman Concave-convex faceting method and apparatus
US5437167A (en) * 1994-05-12 1995-08-01 Ambar; Betzalel Invisible setting for round diamond stone
US5462474A (en) * 1994-05-24 1995-10-31 Ronald W. Swager Method of facetting a gem
US5761929A (en) * 1996-09-12 1998-06-09 M. Fabrikant & Sons, Ltd. Facet cut structure for colored stones to enhance brilliance
US6397832B1 (en) * 1998-06-17 2002-06-04 Naotake Shuto Diamond cutting method and new-cut diamond shape
US6422039B2 (en) * 2000-07-20 2002-07-23 D. Swarovski & Co. Gem
US6694778B2 (en) * 2000-08-25 2004-02-24 Hohoemi Brains, Inc. Cut design of diamond for ornamental use
US6892720B2 (en) 2000-09-26 2005-05-17 Michael Schachter Method for cutting natural and/or man-made diamonds
US6615611B1 (en) 2000-09-26 2003-09-09 Michael Schachter High yield diamond
US20030181147A1 (en) * 2000-09-26 2003-09-25 Michael Schachter Method for cutting natural and/or man-made diamonds
US20030188551A1 (en) * 2000-09-26 2003-10-09 Michael Schachter High yield diamond
US6305193B1 (en) 2000-10-17 2001-10-23 Continental Jewelry (Usa) Inc. Gemstone
US6604382B2 (en) 2000-11-07 2003-08-12 Naotake Shuto New-cut diamond shape
US6668585B1 (en) * 2000-11-13 2003-12-30 David Markowitz Multi-faceted combined cut gemstones
US6401489B1 (en) 2001-02-12 2002-06-11 Continental Jewelry (Usa), Inc. Gemstone
US6698239B2 (en) 2001-02-23 2004-03-02 Samuel Aaron, Inc. Brilliant cut diamond
US6745596B2 (en) 2001-05-31 2004-06-08 Samuel Aaron, Inc. Princess cut diamond
US6591827B2 (en) * 2001-06-25 2003-07-15 Roy Fuchs Method for preparing a diamond
US6578380B1 (en) 2002-01-24 2003-06-17 Diaco Hexagonal brilliant cut diamond
US6761044B2 (en) 2002-04-11 2004-07-13 Premier Gem Corp Gemstone cut
US7228856B2 (en) * 2003-02-13 2007-06-12 Tokyo Shinzyu Co., Ltd. Diamond cutting method and diamond provided by the method
US20060137674A1 (en) * 2003-02-13 2006-06-29 Takeshi Aoyagi Diamond cutting method and diamond provided by the method
US20050252241A1 (en) * 2004-05-13 2005-11-17 Israel Oster Diamond cut
WO2006085645A1 (ja) * 2005-02-14 2006-08-17 Imagine Ltd. 宝石
US10362843B2 (en) 2007-12-14 2019-07-30 II Leonard J. Strnad Gemstone and method for cutting the same
US20110000259A1 (en) * 2007-12-14 2011-01-06 Strnad Iii Leonard J Gemstone and method for cutting the same
US20090308104A1 (en) * 2008-06-16 2009-12-17 Morris Gad Gemstone cut
US8156760B2 (en) 2008-06-16 2012-04-17 Albert Gad, Ltd. Gemstone cut
WO2014011124A1 (en) * 2012-07-12 2014-01-16 Surasith Sriorathaikul Diamond-cut enamel
US10085530B2 (en) * 2012-10-12 2018-10-02 D. Swarovski Kg Chaton cut for a gemstone made of topaz
US20150201720A1 (en) * 2012-10-12 2015-07-23 D. Swarovski Kg Cut for gemstone
US9226554B2 (en) 2014-05-12 2016-01-05 Yoshihiko Kodama Circular cut diamond
US10405618B1 (en) * 2016-09-27 2019-09-10 Brian Steven Gavin Maximum light performance gemstone cutting technique
USD899294S1 (en) * 2018-07-16 2020-10-20 Diarough Nv Faceted gemstone

Also Published As

Publication number Publication date
FR2052468A5 (xx) 1971-04-09
NL7007322A (xx) 1970-12-14
GB1306854A (en) 1973-02-14
DE2025689A1 (de) 1970-12-17
AT302092B (de) 1972-09-25
DE7019610U (de) 1971-04-08
ZA703524B (en) 1971-01-27
CA930553A (en) 1973-07-24
ES380369A1 (es) 1973-04-16
LU61003A1 (xx) 1970-07-28
BE751146A (nl) 1970-11-03
CH504276A (de) 1971-03-15

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