Abstract:
A precious stone is formed having a plurality of tetrahedron shaped structures (12, 14, 14', 16) disposed on the sides of the stone between the table (18) and the girdle (20). The tetrahedron shaped structures (100, 110, 100', 112) are also provided on the sides of the precious stone below the girdle (20). The tetrahedron structures may be disposed on square shaped precious stones, rectangularly shaped precious stones and emerald cut stones and the tetrahedron shaped structures may be stacked in a vertical orientation on the sides of the precious stone below the girdle.
Abstract:
Various embodiments described herein comprise a gemstone or other piece of jewelry, which incorporates one or more diffractive optical elements to enhance the fire displayed by the gemstone. In certain embodiments, the diffractive optical element comprises a diffraction grating etched on one or more facets of the gemstone.
Abstract:
A multi-stone setting for gemstones which includes at least one prong, a first arrangement and at least one second arrangement. The first arrangement includes at least one first holding member, which is coupled to the prong, and which extends in a first plane. The second arrangement includes at least one second holding member, and coupled to the prong and to the first arrangement. The second arrangement extends in at least one second plane. The second plane is provided at an angle which is between 0 DEG and 90 DEG with respect to the first plane. The second holding member forms at least two gemstone seats.
Abstract:
A compound of gems comprising a multiplicity of gems connected by means of threads (4, 5) which are made of shrunk plastics and form a grid (3), whereby the grid extends beyond the gems. The gems have grooves (6, 7) which are provided for engagement with the threads of the grid in order to give stability to the compound.
Abstract:
A stone cluster effect article having substantially parallel front and back faces, comprising a relief pattern of faceted projections on its back face, the front face being unfaceted, the faceted projections comprising close packed prisms or right pyramids with even numbers of sides with an apex angle of between 80º and 100º. The article can comprise jewellery, objets d'art or objets de vertu, or glassware, and the effect is to make the article appear particularly bright.
Abstract:
A mounting (10) holds a grooved gemstone (12) invisibly to a setting (30). One end of the mounting (10) has arms or extensions (20 and 22) to receive the gemstone (12) and protrusions (18) extending inwardly from the arms (20 and 22) to fit in the grooves (16) of the gemstone (12), the mounting (10) further comprises a holding configuration (24) for holding the mounting (10) to the setting (30). Insertion of the mounting (10) into the setting (30) may in one version distort the holding configuration (24) and levers the arms (20 and 22) to press harder into the grooves (16).
Abstract:
A system for setting a gemstone in a hollow jewellery piece, comprises means for creating a metallic attachment region secured to a surface of the gemstone, and a bonding means for bonding the at least one metallic attachment region to a shell of the hollow jewellery piece. The metallic attachment region is created by metallizing a circumferential portion of the surface of the gemstone, and electrodepositing a layer of metal on the metallized portion of the surface of the gemstone. Alternatively, the metallic attachment region is created by providing a metallic rod of cross-section conforming to the profile of a circumferential portion of the gemstone, and forming the metallic rod to abut, along its length, the circumferential portion of the gemstone.
Abstract:
A mounting (10) holds a grooved gemstone invisibly to a setting. One end of the mounting (10) has arms or extensions (14), reinforced by struts (26), to receive the gemstone and protrusions (16) extending inwardly from the arms (14) to fit in the grooves of the gemstone, the mounting (10) further comprising a retainer which is inserted into the setting, and then twisted to retain the mounting (10) in place and may lever the arms (14) to press harder into the groove. The mounting (10) is adjustable. The retainer may be cylindrical, with a lengthwise split (28) to make the deformation easier. As an alternative, the insertion may comprise planar members (42, 44; 52, 54; 62, 64; 72, 74) which are likewise inserted and then distorted. The mounting (10) may have two or more gemstone compartments. Multiple coronets (94) may be fitted on a molded base (92) with reinforcements (102) between the coronets.
Abstract:
A new and improved stone setting (1) that supports the stone (2) with an invisible setting comprising a notch (6) on a facet (19) of the stone (2) with a portion of an upwardly extending support bracket (3) extending into the notch (6) and forming an interference fit therewith. The notch (6) is generally V-shaped with an upper surface and a lower surface. The stone setting (1) does not require support from a sidewall or a prong.
Abstract:
A multi-stone setting for gemstones which includes at least one prong, a first arrangement and at least one second arrangement. The first arrangement includes at least one first holding member, which is coupled to the prong, and which extends in a first plane. The second arrangement includes at least one second holding member, and coupled to the prong and to the first arrangement. The second arrangement extends in at least one second plane. The second plane is provided at an angle which is between 0 DEG and 90 DEG with respect to the first plane. The second holding member forms at least two gemstone seats.