Classifications

• • A—HUMAN NECESSITIES
  • A44—HABERDASHERY; JEWELLERY
  • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
  • A44C27/00—Making jewellery or other personal adornments
• • A—HUMAN NECESSITIES
  • A44—HABERDASHERY; JEWELLERY
  • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
  • A44C17/00—Gems or the like
  • A44C17/001—Faceting gems
• • 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
  • A44C17/04—Setting gems in jewellery; Setting-tools

Definitions

• the invention relates to cut gems and articles comprising such gems.
• US 8 181 482 discloses a gem whose size is made from a princess size, and which reminds the shape of a butterfly.
• the cut gemstone described in this document includes:
• the invention aims to provide a cut gem alternative, having a particularly bright sparkle.
• the gem exhibits a sharper luster than that obtained with a gem as described in US 8,181,482.
• the gemstone may also comprise the features presented below, taken separately or in combination.
• the crown may include: o four table corner facets positioned at the four corners of the table,
• each of the four sides of the crown comprising:
• the twenty four facets of the crown have four side faces, four bezels, four cuts, eight star facets and four table corner facets.
• the table is part of a table plan
• each bezel is part of a bezel plan
• a bezel plane is inclined with respect to the table plane at an angle of substantially between 35 and 39 °.
• the breech can include:
• a breech star with four breech-star facets connecting the breech point and the vertices of a girdle, and o at least three breech fences positioned on each side of each breech star facet, between a breech star facet and a flag among said four flags.
• the thirty-two facets of the breech include four breechblocks, four breech-star facets and twenty-four breech fences.
• each flag is part of a flag plan
• each roof plane is inclined with respect to the table plane at an angle of substantially between 58 and 62 °.
• the cut gemstone can be made with the following features:
• each of the rounder sides has a rounder side length which is the shortest distance taken between two adjacent roundel vertices
• said star of breech has a base of square section in the vicinity of the breech point
• the square section base has a diagonal whose length is substantially between 5 and 11% of the rounder side length, preferably between 5.5 and 10.5%.
• the cut gemstone may also include the following features:
• each of the rounder sides has a rounder side length which is the shortest distance taken between two adjacent roundel vertices
• each of the rounder sides has a maximum depth, taken perpendicular to a line connecting the two adjacent vertices of rondiste,
• said maximum depth is substantially between 5.5 and 9.5% of said length of a rounder side.
• cut gemstone may further include the following features:
• each of the rounder sides has a rounder side length which is the shortest distance taken between two adjacent roundel vertices
• the table has eight table vertices, of which four table vertices are also corners of table corners and four other vertices, alternating with the tops of table corners, also constitute vertices of cut,
• the gem is a diamond.
• the invention also relates to a jewelery article comprising at least one gem as defined above.
• FIG. 1 shows a gem according to an advantageous embodiment according to the invention, seen from above,
• FIG. 2 shows the gem represented in FIG. 1, seen from below
• FIG. 3 shows the gem illustrated in FIGS. 1 and 2, in side view.
• the gem illustrated in Figures 1 to 3 is made from a princess cut diamond (that is to say a diamond whose general shape is similar to a pyramid whose base is square). However, it will be easy for the skilled person to achieve the particular size of stone that will now be described on other precious or semi-precious stones.
• the upper part of the gem that is to say the part of the gem that is usual to present towards the outside of a jewel when the gem is set on the jewel. This is the part of the gem visible directly by an observer.
• the upper part of the gennna has, in the usual way, a gem table formed by a flat facet and a crown, surrounding the table and formed of several contiguous facets.
• the ring extends substantially in a first direction H (see Figure 3).
• the lower part of the gem facing the jewel will be called the gem's breech.
• the yoke extends in a direction B opposite to the direction H and will be described later with reference to FIG.
• Figure 1 shows a top view of a gem according to the invention, and therefore an upper part of the gem, whose general shape is substantially square.
• the widest part of the gem giving the diameter of the gemstone will be called the "girdle”.
• the gem shown in the figures thus has a roughly square shaped girdle 3, which has four vertices 1 (hereinafter referred to as girdle vertices). between them by four sides 2 of equal length rondist.
• each of the four sides 2 of the rondist is in the form of an arc of a circle (concave) whose concavity is turned towards the outside of the gem.
• FIG. 3 illustrates a side 2 of the girdle 3, the girdle 3 being schematically illustrated in broken lines between the two girdle vertices 1 in FIG.
• a table 4 octagonal In the center of the upper part of the gem shown in Figure 1, is a table 4 octagonal.
• Four of the vertices of the octagonal table 4 align with the vertices of the girdler 1 along a diagonal D1 or D2 of the girdle, and constitute the corners 5 of the corner of the table.
• the other vertices of the table 4 alternate with the table corner vertices 5 and constitute vertex 6 of cut.
• Each of the two sides of the girdle 3 has a length L of the girdle side, which is the shortest distance taken between two adjacent girdle vertices 1.
• the cutoff vertices 6 are each equidistant from two vertices 1 of adjacent rondist.
• the position of a cutoff vertex 6 is chosen on a line D4, which is perpendicular to the straight line D3 connecting the two vertices 1 of rondiste and which passes through the center C of the segment connecting the two vertices 1 of rondiste.
• the distance L1 between the center C and the cutoff vertex 6 is chosen such that it is substantially between 18 and 22% of the length L of the side 2 of the rounder.
• the distance L1 between the center C and the cutoff vertex 6 corresponds to substantially 20% of the length L between two vertices 1 of the girdle.
• the depth L 2 of the concavities of the sides 2 of the girdle is also chosen according to the length L the shortest distance between two vertices 1 of the girdle (see FIG. 1).
• the depth L2 corresponds substantially between 5.5 and 9.5% of the length L of a side 2 of the rounder (see FIG. 1).
• the ring 7 comprises, in the example illustrated in the figures, four lateral faces 8 which correspond to the four faces along the profile of the curvature of the sides 2 of the girdle (see FIG. 3).
• the ring 7 has four substantially diamond-shaped table corner facets 9, one of whose peaks is formed by a table top 5 and an opposite vertex is formed by a top 1 of the round.
• the other two vertices of the table corner facets 9 are referenced T in FIG.
• the crown also has four bezels 10 formed by facets defined between two adjacent vertices 1 of rondiste and two vertices T of the two facets 9 of adjacent table wedges associated with adjacent vertices 1 of rondiste and taken into consideration.
• the inclination of the bezels with respect to the plane of the table 4 is such that the plane P1 of the bezels is at an angle ⁇ with the plane P2 in which the table 4 is inscribed, the angle a being between 35 and 39 ° ( substantially 37 ° in the context of the example illustrated in Figure 3).
• the crown 7 further comprises four facets called cuts 1 1, of triangular shape, located between the bezels and the table 4, and having for vertices two vertices 7 (in common with the bezels 10) and the vertex 6 of cut (in common with the table 4).
• the crown comprises eight star facets 12, each of triangular shape, so called because they form a star around the table 4.
• the gem according to the invention and shown in the figures comprises a ring 7 which has twenty-four facets in total.
• the yoke 13 extends between the girdle 3 and a bolt 14 which it comprises.
• the girdle 3 being substantially square in shape, the yoke 13 has substantially the shape of a pyramid whose base is of square shape.
• the yoke 13 comprises a star 15 which has four branches connecting the bolt 14 and each vertex 1 of the rounder.
• the four branches of the breech star are called "breech star 16 facets”.
• Each of the branches has a wide base 17 and a narrow peak-shaped vertex 18 which connects the girdle top.
• the wide bases 17 of the four breech-star-shaped facets 16 form the four abstract sides of a square (represented in dashed lines) whose center is made by the breech point.
• the diagonal 20 has a diagonal 20 whose length is between 5 and 1 1% of the length L of the side of the rounder, preferably between 5.5 and 10.5%. In this example, the length of the diagonal 20 is substantially equal to 8% of the length L.
• the breech 13 has four breechblocks 21 contiguous with the lateral faces 8.
• Each breechblock 21 is formed by a flat facet with three sides: a first side 22 is curved and is common with one side of the face 8.
• a second and third sides 23 and 24 are of the same length and each of the second and third sides connects a girder vertex 1 to a point 25 on a line with the diagonal 20.
• the position of the point 25 on the line carrying the diagonal 20 is determined by the orientation of a plane P3 of the horn with respect to the plane P2 of table 4: according to the invention, the angle of inclination ⁇ of the plane P3 relative to the plane P2 is substantially 60 ° (more or less 2 ° - see Figure 3).
• breech fences 26 Between a breech 21 and a breech star 16 facet, are provided three facets of breech fences 26.
• Each breech closing facet 26 is of triangular shape, with a base 27 which is carried by the straight line bearing the diagonal 20, and two sides connecting the base 27 to a rounder vertex 1.
• the three breech fences 26 thus have three bases 27 aligned along the line carrying the diagonal 20 and the point 25. Depending on the position of the breech closing facet 26, it also has a common side with a breech star facet 16, or with a breech 21 or no side in common if the breech closing facet 26 is between two other facets breech fence 26.
• the yoke 13 comprises twenty-four facets breech fence 26, having a base 27 which is common to two facets breech fence 26 which are the image of each other by axial symmetry whose axis corresponds to the right bearing the diagonal 20.
• the breech of the gem shown in the figures comprises thirty-two facets among which twenty-four facets breech fence 26, four pavilions 21, and four star-stud facets 16.
• the invention is not limited to the gem that has specifically been described. Furthermore, the invention extends to any jewelery article comprising at least one gem such as that particularly described and shown above.

Landscapes

• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Adornments (AREA)
• Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (1)

Family

ID=52392079

Family Applications (1)

Country Status (8)

Cited By (1)

Families Citing this family (3)

Citations (2)

Family Cites Families (10)

• 2014
  • 2014-11-24 FR FR1461352A patent/FR3028725B1/fr not_active Expired - Fee Related
• 2015
  • 2015-09-18 JP JP2017527727A patent/JP2017536890A/ja active Pending
  • 2015-09-18 CN CN201580062349.0A patent/CN107205531A/zh active Pending
  • 2015-09-18 RU RU2017122007A patent/RU2689879C2/ru active
  • 2015-09-18 US US15/526,250 patent/US20170303647A1/en not_active Abandoned
  • 2015-09-18 WO PCT/FR2015/052499 patent/WO2016083680A1/fr active Application Filing
• 2017
  • 2017-05-15 IL IL252293A patent/IL252293A0/en unknown
• 2018
  • 2018-03-26 HK HK18104117.0A patent/HK1244644A1/zh unknown

Patent Citations (2)

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