Shaped articles 42, 43 are inseparably and integrally formed of a colorless transparent material or a colored transparent material, and a peripheral surface has an uneven shape. In the shaped article 42 formed by a flat and irregular polyhedron and the article 43 formed by a plurality of recesses 44 shaped by burning, the entered light is refracted and reflected in various directions and radiated outside the shaped articles to be seen by a viewer. In the shaped article 43, a housed object 45 is visually complemented by the shadowed part of the recesses 44. Thus, the light is seen by the viewer. The visual effect of making the front surface shine brightly can be kept by dispersing and reflecting incident light. In addition, a risk of bodily injury and environmental disaster caused by light concentration can be avoided by suppressing transmission light irradiated from the irregular polyhedron and the recesses 44.

Shaped articles 42, 43 are inseparably and integrally formed of a colorless transparent material or a colored transparent material, and a peripheral surface has an uneven shape. In the shaped article 42 formed by a flat and irregular polyhedron and the article 43 formed by a plurality of recesses 44 shaped by burning, the entered light is refracted and reflected in various directions and radiated outside the shaped articles to be seen by a viewer. In the shaped article 43, a housed object 45 is visually complemented by the shadowed part of the recesses 44. Thus, the light is seen by the viewer. The visual effect of making the front surface shine brightly can be kept by dispersing and reflecting incident light. In addition, a risk of bodily injury and environmental disaster caused by light concentration can be avoided by suppressing transmission light irradiated from the irregular polyhedron and the recesses 44.

The invention is directed to shallow pavilion, cut diamonds having excellent optical characteristics. The shallow pavilion cut diamonds of the invention have a table with a table plane and a girdle. The cut diamonds have a shape and configuration that result in a specific total depth percentage, a specific crown height percentage, a specific girdle height percentage and a specific table percentage. A crown surface is located between the table and the girdle and extends in a crown angle to the table plane. A pavilion surface extends at a pavilion angle relative to the table. The pavilion surface includes a plurality of substantially planar main pavilion facets, each of which extend from the girdle to a pointed culet defining the bottom most portion of the cut diamond. The crown angle is in the range of between about 29 degrees to about 36 degrees, and the pavilion angle is in the range of between about 15 degrees and about 34.5 degrees. The shallow pavilion, cut diamonds of the invention may be either round shaped cut diamonds or fancy shaped cut diamonds.

The invention is directed to shallow pavilion, cut diamonds having excellent optical characteristics. The shallow pavilion cut diamonds of the invention have a table with a table plane and a girdle. The cut diamonds have a shape and configuration that result in a specific total depth percentage, a specific crown height percentage, a specific girdle height percentage and a specific table percentage. A crown surface is located between the table and the girdle and extends in a crown angle to the table plane. A pavilion surface extends at a pavilion angle relative to the table. The pavilion surface includes a plurality of substantially planar main pavilion facets, each of which extend from the girdle to a pointed culet defining the bottom most portion of the cut diamond. The crown angle is in the range of between about 29 degrees to about 36 degrees, and the pavilion angle is in the range of between about 15 degrees and about 34.5 degrees. The shallow pavilion, cut diamonds of the invention may be either round shaped cut diamonds or fancy shaped cut diamonds.

The invention relates to a gemstone cut, comprising a crown having a flat table and main crown facets (10-12) being arranged around the table (1) and being inclined relative to the table, a girdle (5) at which the gemstone has its largest transverse dimension, and a pavilion adjoining the girdle from below the girdle and having main pavilion facets (7) around the girdle, whereby the number of the main pavilion facets is odd. The invention also relates to an article comprising a gemstone according to the invention and a method for improving the optical properties of a gemstone.

Provided is a gemstone treated with a cut expressing a reflected image pattern not recognized before, wherein the gemstone includes the crown 100 having the table 110 and plural bezel facets 130, and the pavilion 200 having the culet 210 and plural main facets 220; the girdle 300 is formed between the crown 100 and the pavilion 200; a direction of a horizontal component of an inclination direction of the bezel facet 130 from the table 110 to the girdle 300 is set to be different from a direction of a horizontal component of an inclination direction of the main facet 220 from the culet 210 to the girdle 300; and inclination angles of the bezel facet 130 and the main facet 220 are set so that a light that enters the table 110 is reflected by two of the main facets 220 and emitted from the bezel facet 130.

Provided is a gemstone treated with a cut expressing a reflected image pattern not recognized before, wherein the gemstone includes the crown 100 having the table 110 and plural bezel facets 130, and the pavilion 200 having the culet 210 and plural main facets 220; the girdle 300 is formed between the crown 100 and the pavilion 200; a direction of a horizontal component of an inclination direction of the bezel facet 130 from the table 110 to the girdle 300 is set to be different from a direction of a horizontal component of an inclination direction of the main facet 220 from the culet 210 to the girdle 300; and inclination angles of the bezel facet 130 and the main facet 220 are set so that a light that enters the table 110 is reflected by two of the main facets 220 and emitted from the bezel facet 130.

A “hole-in” cravat comprises a central nape portion for fitting around a neck and opposite first and second end portions of the cravat wherein at least one opening is provided through the first end portion of the cravat wherein the second end portion is fed through the at least one opening or wherein an adornment is displayed within the at least one opening.

A protective apparatus includes a gemstone and a foreign material encapsulated and physically isolated within an interior space of the gemstone. The gemstone is one of a precious gemstone or a semi-precious gemstone or a semi-precious stone.

The present invention relates to a health artificial pearl and a manufacturing method therefor and, more specifically, to: a health artificial pearl formed by spray-drying and pressure-firing a functional mineral that emits anions and radiates far infrared rays, so as to form a core with high compressive strength, and by coating the surface of the core with an artificial pearl composition, which is nontoxic to the human body; and a manufacturing method therefor. The method for manufacturing a health artificial pearl comprises: (S100) a material pretreatment step of wet-grinding a functional mineral that emits anions and radiates far infrared rays so as to form a wet-ground solution, and spray drying the wet-ground solution so as to prepare a powder for press forming; (S200) a press forming step of injecting, into a press forming apparatus, the powder for press forming so as to form a core, and high-temperature-firing the core; (S300) a core polishing step of polishing the high-temperature-fired core; and (S400) a coating step of coating the polished core with an artificial pearl composition.