US20160213104A1 - Diamond cuts providing increased light amplification - Google Patents
Diamond cuts providing increased light amplification Download PDFInfo
- Publication number
- US20160213104A1 US20160213104A1 US14/604,955 US201514604955A US2016213104A1 US 20160213104 A1 US20160213104 A1 US 20160213104A1 US 201514604955 A US201514604955 A US 201514604955A US 2016213104 A1 US2016213104 A1 US 2016213104A1
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- US
- United States
- Prior art keywords
- precious stone
- angle
- range
- crown
- stone
- 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.)
- Granted
Links
- 239000010432 diamond Substances 0.000 title claims abstract description 20
- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 13
- 230000003321 amplification Effects 0.000 title claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 title claims description 5
- 239000010437 gem Substances 0.000 claims abstract description 36
- 229910001751 gemstone Inorganic materials 0.000 claims abstract description 36
- 239000004575 stone Substances 0.000 claims description 20
- 229940074869 marquis Drugs 0.000 claims description 2
- VBUNOIXRZNJNAD-UHFFFAOYSA-N ponazuril Chemical compound CC1=CC(N2C(N(C)C(=O)NC2=O)=O)=CC=C1OC1=CC=C(S(=O)(=O)C(F)(F)F)C=C1 VBUNOIXRZNJNAD-UHFFFAOYSA-N 0.000 claims description 2
- 241000579895 Chlorostilbon Species 0.000 abstract description 23
- 239000010976 emerald Substances 0.000 abstract description 23
- 229910052876 emerald Inorganic materials 0.000 abstract description 23
- 238000010586 diagram Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
- A44C17/00—Gems or the like
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
- A44C17/00—Gems or the like
- A44C17/001—Faceting gems
Definitions
- the present invention is generally directed to gemstones and, more particularly, to non-round gemstones, preferably diamonds, having a unique cut that produces greater light amplification at the crown and table surfaces thereof.
- the original round, brilliant-cut was developed by Marcel Tolkowsky in 1919.
- the round brilliant consists of 58 facets and is widely popular.
- non-round diamond shapes have come into vogue.
- the present invention is focused on non-round diamond cuts, such as those that are known as the emerald, cushion and radiant cuts. But the disclosure herein is also applicable to other oblong shapes, such as the marquis and oval cuts. It may even be applied to the asscher and princess cuts as well.
- the unique look of the emerald cut diamonds is created by the “step cuts” of its pavilion and its large, open table.
- the present invention builds and improves upon the specially-shaped emerald diamond shown in the present inventor's issued U.S. Design Pat. No. D698,298, the contents of which are incorporated herein by reference.
- emerald and cushion cut diamonds have associated therewith certain parameters. These parameters include the crown angle, the crown height percentage, the girdle height percentage, the pavilion angle, the table percentage and the total depth percentage.
- the crown angle for an emerald cut is in the range of 35-36°.
- the pavilion angle is in the range of 40-41.5°.
- the total depth percentage is conventionally in the range of 60-70%.
- emerald cut diamonds do not provide the brilliance and light reflecting experience which is the hallmark of the round, brilliant cut stones.
- the diamond trade has invested enormous efforts in searching for and attempting to find cuts that would increase the brilliance of oblong gemstones such as the emerald and cushion cut stones.
- an oblong precious stone that includes: a table having a table plane; a first long crown surface extending at a predetermined crown angle to the table plane; a second long crown surface opposed to the first long crown surface and extending at said crown angle relative to the table plane; a first long pavilion surface extending at a predetermined pavilion angle relative to the table plane; a second long pavilion surface extending oppositely to the first long pavilion surface and extending at said predetermined pavilion angle relative to the table plane; wherein said predetermined crown angle is in the range of 30-36 and wherein said pavilion angle is in the range of 30-34; and wherein said predetermined crown angle and said pavilion angle are so formed that the predetermined crown angle is either equal to or larger than said pavilion angle by an angle that does not exceed 6 degrees.
- the precious stone has a crown angle in the range of 31-34; a crown height percentage of 8-13; a girdle height percentage of 3.5-4.5; a pavilion angle in the range of 31-33; a table percentage in the range of 72-77 and a total depth percentage in the range of 40-50.
- FIG. 1 is a top view of an emerald stone in accordance with the present invention.
- FIG. 2 is a bottom view of an emerald stone in accordance with the present invention.
- FIG. 3 is an end view of an emerald stone in accordance with the present invention.
- FIG. 4 is a side view of an emerald stone in accordance with the present invention.
- FIG. 5 shows parameters of a conventional emerald cut stone indicating the values of the crown angle, crown height percentage, pavilion angle, table percentage and total depth percentage.
- FIG. 6 is a light reflection diagram for a conventional emerald cut stone.
- FIG. 7 is a light reflection diagram for the emerald cut and other stone cuts in accordance with the present invention.
- FIG. 8 replicates FIG. 3 and is annotated with the various parameters thereof.
- FIGS. 1-4 one can note the cushion-cut diamond 10 in FIG. 1 , its table 12 , crown 14 and left and right side oblong pavilions 16 , 18 which meet at a culet-like line 20 .
- FIG. 3 shows that the oblong pavilions 16 , 18 extending at a distinct pavilion angle relative to the table surface (or to a line pressing through the girdle) of the precious stone.
- the crown angle is also indicated, although it is noted that the crown angle is more definitively provided in an emerald cut diamond.
- the instant inventor has discovered that a brilliant-like reflection pattern can be obtained by providing an emerald cut stone with a very shallow underside, namely by forming the pavilion angles in the range of 30 to 34 degrees, preferably 31 to 33 degrees, as opposed to the conventional pavilion angles which are in the range of 40 to 41.5 degrees. Furthermore, unlike the total depth percentage which is conventionally in the range of 60 to 70 percent, the present invention realizes its unexpectedly improved brilliance and light amplification characteristics by setting the total depth percentage in a range from 36.00 to 57.00.
- the crown angle is preferably from 30 to 36 degrees.
- the table below provides the relevant parameters for an emerald cut diamond, indicating in each instance a minimum value, a maximum value and a preferred range.
- the pavilion angle is 6° or less than the crown angle. In other words, the pavilion angle ⁇ 6° crown angle.
- the light pattern for an emerald stone in accordance with the present invention follows a path whereby light is reflected from one pavilion surface to an opposed crown surface, then to the other pavilion surface, then to the table, then back to the pavilion surface, then to the crown, then to the opposed pavilion and only then out to the table.
- This light pattern with light rays being repeatedly reflected and refracted between many diamond surfaces creates an extremely brilliant light display that has been very well received and appreciated by those who have seen it.
- the crown angle is indicated to be (for a conventional emerald stone) 36.7°.
- the pavilion angle is shown to be at 57.8°.
- the total depth percentage is 64.8% and is calculated as the ratio of the height divided by the width of the stone.
- the table percentage (68.5%) is calculated relative to the entire width of the stone measured across the oblong pavilion surfaces.
- the corresponding values for the stone of the present invention ( FIG. 8 ) are set forth in the tabulation above.
Landscapes
- Adornments (AREA)
Abstract
Description
- The present invention is generally directed to gemstones and, more particularly, to non-round gemstones, preferably diamonds, having a unique cut that produces greater light amplification at the crown and table surfaces thereof.
- The original round, brilliant-cut was developed by Marcel Tolkowsky in 1919. The round brilliant consists of 58 facets and is widely popular. In more recent years, non-round diamond shapes have come into vogue. The present invention is focused on non-round diamond cuts, such as those that are known as the emerald, cushion and radiant cuts. But the disclosure herein is also applicable to other oblong shapes, such as the marquis and oval cuts. It may even be applied to the asscher and princess cuts as well. The unique look of the emerald cut diamonds is created by the “step cuts” of its pavilion and its large, open table. Instead of the sparkle of the brilliant cut, emerald cut diamonds produce a hall-of-reflection-mirrors effect, with an interplay of light and dark planes. While less fiery, the long lines and dramatic flashes of light give the emerald cut an elegant appeal.
- The present invention builds and improves upon the specially-shaped emerald diamond shown in the present inventor's issued U.S. Design Pat. No. D698,298, the contents of which are incorporated herein by reference.
- As is well known, emerald and cushion cut diamonds have associated therewith certain parameters. These parameters include the crown angle, the crown height percentage, the girdle height percentage, the pavilion angle, the table percentage and the total depth percentage. Conventionally, the crown angle for an emerald cut is in the range of 35-36°. The pavilion angle is in the range of 40-41.5°. The total depth percentage is conventionally in the range of 60-70%.
- As could be appreciated from the foregoing, emerald cut diamonds do not provide the brilliance and light reflecting experience which is the hallmark of the round, brilliant cut stones. The diamond trade has invested enormous efforts in searching for and attempting to find cuts that would increase the brilliance of oblong gemstones such as the emerald and cushion cut stones.
- It is an object of the present invention to provide oblong gemstone shapes that are more sparkling.
- It is another object of the invention to provide oblong shaped gemstones, particularly diamonds, that provide greater light reflection amplification.
- The foregoing and other objects of the invention are realized by an oblong precious stone that includes: a table having a table plane; a first long crown surface extending at a predetermined crown angle to the table plane; a second long crown surface opposed to the first long crown surface and extending at said crown angle relative to the table plane; a first long pavilion surface extending at a predetermined pavilion angle relative to the table plane; a second long pavilion surface extending oppositely to the first long pavilion surface and extending at said predetermined pavilion angle relative to the table plane; wherein said predetermined crown angle is in the range of 30-36 and wherein said pavilion angle is in the range of 30-34; and wherein said predetermined crown angle and said pavilion angle are so formed that the predetermined crown angle is either equal to or larger than said pavilion angle by an angle that does not exceed 6 degrees.
- Preferably, the precious stone has a crown angle in the range of 31-34; a crown height percentage of 8-13; a girdle height percentage of 3.5-4.5; a pavilion angle in the range of 31-33; a table percentage in the range of 72-77 and a total depth percentage in the range of 40-50.
- Other features and advantages of the present invention will become apparent from the following description of the invention which refers to the accompanying drawings.
-
FIG. 1 is a top view of an emerald stone in accordance with the present invention. -
FIG. 2 is a bottom view of an emerald stone in accordance with the present invention. -
FIG. 3 is an end view of an emerald stone in accordance with the present invention. -
FIG. 4 is a side view of an emerald stone in accordance with the present invention. -
FIG. 5 shows parameters of a conventional emerald cut stone indicating the values of the crown angle, crown height percentage, pavilion angle, table percentage and total depth percentage. -
FIG. 6 is a light reflection diagram for a conventional emerald cut stone. -
FIG. 7 is a light reflection diagram for the emerald cut and other stone cuts in accordance with the present invention. -
FIG. 8 replicatesFIG. 3 and is annotated with the various parameters thereof. - Referring to
FIGS. 1-4 , one can note the cushion-cut diamond 10 inFIG. 1 , its table 12,crown 14 and left and right side oblongpavilions like line 20.FIG. 3 shows that theoblong pavilions - In marked departure from the prior art, the instant inventor has discovered that a brilliant-like reflection pattern can be obtained by providing an emerald cut stone with a very shallow underside, namely by forming the pavilion angles in the range of 30 to 34 degrees, preferably 31 to 33 degrees, as opposed to the conventional pavilion angles which are in the range of 40 to 41.5 degrees. Furthermore, unlike the total depth percentage which is conventionally in the range of 60 to 70 percent, the present invention realizes its unexpectedly improved brilliance and light amplification characteristics by setting the total depth percentage in a range from 36.00 to 57.00. The crown angle is preferably from 30 to 36 degrees.
- The realization of the unexpected brilliance of the diamond cut herein described is also dependent on assuring that the pavilion angle is equal to or smaller by up to 6 degrees, as compared to the crown angle.
- The table below provides the relevant parameters for an emerald cut diamond, indicating in each instance a minimum value, a maximum value and a preferred range.
-
-
PARAMETER MINIMUM PREFERRED RANGE MAXIMUM Crown Angle° 30 30-33 36 Crown Height % 6 8-13 15 Girdle Height % 3 3.5-4.5 5 Pavilion Angle° 30 31-33 34 Table % 70 72-77 79 Total Depth % 36 40-50 57 - Additional criteria of the foregoing is that the pavilion angle is 6° or less than the crown angle. In other words, the pavilion angle <6° crown angle.
- By adhering to the criteria set forth in the above table, and with reference to
FIGS. 6 and 7 , one can compare the light reflection pattern, which has actually been measured for a gemstone embodiment of the invention, and so note in the conventional gemstone, a ray of light that strikes the table perpendicularly hits the pavilion at one side, is then reflected to the opposed pavilion side and eventually reflected back out through the table with only a small portion of the light traversing the volume between the different surfaces, none of which is the table. - In marked contrast to the prior art, the light pattern for an emerald stone in accordance with the present invention, follows a path whereby light is reflected from one pavilion surface to an opposed crown surface, then to the other pavilion surface, then to the table, then back to the pavilion surface, then to the crown, then to the opposed pavilion and only then out to the table. This light pattern, with light rays being repeatedly reflected and refracted between many diamond surfaces creates an extremely brilliant light display that has been very well received and appreciated by those who have seen it.
- In
FIG. 3 , the crown angle is indicated to be (for a conventional emerald stone) 36.7°. The pavilion angle is shown to be at 57.8°. The total depth percentage is 64.8% and is calculated as the ratio of the height divided by the width of the stone. The table percentage (68.5%) is calculated relative to the entire width of the stone measured across the oblong pavilion surfaces. The corresponding values for the stone of the present invention (FIG. 8 ) are set forth in the tabulation above. - Although the present invention has been described in relation to particular embodiments thereof, many other variations and modifications and other uses will become apparent to those skilled in the art. It is preferred, therefore, that the present invention be limited not by the specific disclosure herein, but only by the appended claims.
Claims (15)
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/604,955 US9398791B1 (en) | 2015-01-26 | 2015-01-26 | Diamond cuts providing increased light amplification |
EP15880608.3A EP3177169B1 (en) | 2015-01-26 | 2015-09-21 | Diamond cuts providing increased light amplification |
JP2017521142A JP6469217B2 (en) | 2015-01-26 | 2015-09-21 | Diamond cut provides increased light amplification |
PCT/US2015/051173 WO2016122721A1 (en) | 2015-01-26 | 2015-09-21 | Diamond cuts providing increased light amplification |
MYPI2017700502A MY181040A (en) | 2015-01-26 | 2015-09-21 | Diamond cuts providing increased light amplification |
AU2015380380A AU2015380380B2 (en) | 2015-01-26 | 2015-09-21 | Diamond cuts providing increased light amplification |
CN201580036963.XA CN106535695B (en) | 2015-01-26 | 2015-09-21 | Diamond cut method with enhancing light amplification |
CA2953021A CA2953021A1 (en) | 2015-01-26 | 2015-09-21 | Diamond cuts providing increased light amplification |
IL249914A IL249914B (en) | 2015-01-26 | 2017-01-03 | Diamond cuts providing increased light amplification |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/604,955 US9398791B1 (en) | 2015-01-26 | 2015-01-26 | Diamond cuts providing increased light amplification |
Publications (2)
Publication Number | Publication Date |
---|---|
US9398791B1 US9398791B1 (en) | 2016-07-26 |
US20160213104A1 true US20160213104A1 (en) | 2016-07-28 |
Family
ID=56410944
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/604,955 Active US9398791B1 (en) | 2015-01-26 | 2015-01-26 | Diamond cuts providing increased light amplification |
Country Status (9)
Country | Link |
---|---|
US (1) | US9398791B1 (en) |
EP (1) | EP3177169B1 (en) |
JP (1) | JP6469217B2 (en) |
CN (1) | CN106535695B (en) |
AU (1) | AU2015380380B2 (en) |
CA (1) | CA2953021A1 (en) |
IL (1) | IL249914B (en) |
MY (1) | MY181040A (en) |
WO (1) | WO2016122721A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20190274399A1 (en) * | 2016-09-30 | 2019-09-12 | Love Cut, Inc. | Shallow Depth Cut Diamonds |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107373930B (en) * | 2017-09-18 | 2018-09-07 | 董慧娟 | All directions diamond |
CN107440267A (en) * | 2017-09-30 | 2017-12-08 | 深圳市瑰蓝珍宝珠宝有限公司 | A kind of seven side type jewels |
USD955272S1 (en) * | 2019-10-04 | 2022-06-21 | Yair Shimansky | Gemstone |
US11576471B2 (en) | 2020-02-07 | 2023-02-14 | Ecna, Llc | Diamond cuts providing increased light amplification |
EP4371443A1 (en) * | 2022-11-18 | 2024-05-22 | D. Swarovski KG | Cut for gemstone |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2000005993A (en) * | 1998-06-17 | 2000-01-11 | Hisatake Shudo | Cutting method for diamond and proportion of diamond |
US6449985B1 (en) * | 2000-09-14 | 2002-09-17 | Tycoon | Diamond cut |
US6745596B2 (en) * | 2001-05-31 | 2004-06-08 | Samuel Aaron, Inc. | Princess cut diamond |
JP4521171B2 (en) | 2003-09-24 | 2010-08-11 | 株式会社ほほえみブレインズ | Oval cut diamond |
US20050160766A1 (en) * | 2004-01-23 | 2005-07-28 | Toros Kejejian | Diamond cut |
JP4387405B2 (en) * | 2004-04-09 | 2009-12-16 | 株式会社ほほえみブレインズ | Oval cut diamond |
WO2007048331A1 (en) * | 2005-10-28 | 2007-05-03 | Bingzheng Li | A method of adjusting colors of trapeziform and triangular stones |
US9456669B2 (en) | 2005-11-23 | 2016-10-04 | Worldwide Diamond Trademarks Ltd. | Cushion shaped hearts and arrows gemstone and method |
US8353181B2 (en) * | 2007-05-04 | 2013-01-15 | Worldwide Diamond Trademarks Ltd. | Heart shaped diamond cut having hearts and arrows pattern |
WO2009066307A2 (en) * | 2007-08-31 | 2009-05-28 | Zaveri Shehzad E | A gemstone setting |
BE1018665A5 (en) * | 2009-02-20 | 2011-06-07 | Diamscan N V | PRODUCT WITH IMPROVED OPTICAL CHARACTERISTICS. |
RU2426487C2 (en) * | 2009-05-08 | 2011-08-20 | Юрий Константинович Низиенко | Identification mark to mark valuable items and valuable item with its application |
CN102138718A (en) * | 2010-06-18 | 2011-08-03 | 林惠锋 | Diamond combination |
US20120079853A1 (en) | 2010-10-01 | 2012-04-05 | Blasbichler Guenther | Gem with brilliant cut |
US20130213090A1 (en) * | 2012-02-20 | 2013-08-22 | Anthony Ritchie | Hearts & Arrows SiC Cushion-Cut Gemstone |
US20130291589A1 (en) * | 2012-05-03 | 2013-11-07 | Anthony Ritchie | Silicon Carbide Princess Cut Gemstone |
CH707581B1 (en) * | 2013-02-08 | 2020-01-15 | Les Ateliers Horlogers Dior Sa | Piece for watchmaking and method of manufacturing such a piece. |
JP5813788B2 (en) * | 2013-04-26 | 2015-11-17 | 株式会社中央宝石研究所 | Diamond information report creation apparatus and diamond information report creation method |
-
2015
- 2015-01-26 US US14/604,955 patent/US9398791B1/en active Active
- 2015-09-21 AU AU2015380380A patent/AU2015380380B2/en active Active
- 2015-09-21 CN CN201580036963.XA patent/CN106535695B/en active Active
- 2015-09-21 WO PCT/US2015/051173 patent/WO2016122721A1/en active Application Filing
- 2015-09-21 EP EP15880608.3A patent/EP3177169B1/en active Active
- 2015-09-21 MY MYPI2017700502A patent/MY181040A/en unknown
- 2015-09-21 CA CA2953021A patent/CA2953021A1/en not_active Abandoned
- 2015-09-21 JP JP2017521142A patent/JP6469217B2/en active Active
-
2017
- 2017-01-03 IL IL249914A patent/IL249914B/en active IP Right Grant
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20190274399A1 (en) * | 2016-09-30 | 2019-09-12 | Love Cut, Inc. | Shallow Depth Cut Diamonds |
US20210361039A1 (en) * | 2016-09-30 | 2021-11-25 | Leszek Tomasik | Shallow depth cut diamonds |
Also Published As
Publication number | Publication date |
---|---|
EP3177169A1 (en) | 2017-06-14 |
EP3177169A4 (en) | 2018-02-28 |
IL249914B (en) | 2021-03-25 |
AU2015380380A1 (en) | 2017-02-02 |
CN106535695A (en) | 2017-03-22 |
JP6469217B2 (en) | 2019-02-13 |
JP2017532142A (en) | 2017-11-02 |
CA2953021A1 (en) | 2016-08-04 |
EP3177169B1 (en) | 2019-07-10 |
WO2016122721A1 (en) | 2016-08-04 |
MY181040A (en) | 2020-12-16 |
US9398791B1 (en) | 2016-07-26 |
AU2015380380B2 (en) | 2018-08-30 |
IL249914A0 (en) | 2017-03-30 |
CN106535695B (en) | 2018-08-07 |
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