Cut for gemstone
AssigneeD. Swarovski & Co.
InventorsChristian Loinger, Günther Blasbichler
Life of this patent
Estimating the term…
Abstract
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.
Claims19
A gemstone, comprising
- a) a crown having a flat table and main crown facets being arranged around the table and being inclined relative to the table,
- b) a girdle at which the gemstone has its largest transverse dimension, and
- c) a pavilion adjoining the girdle from below the girdle and having main pavilion facets around the girdle,
- characterized in that the main pavilion facets have the same size and shape and adjoin the girdle along a side of the main pavilion facet, and wherein the number of the main pavilion facets is 7 and the number of the main crown facets differs from the number of the main pavilion facets.
A method for improving the optical properties of a gemstone, the gemstone having:
- a) a crown having a flat table and main crown facets being arranged around the table and being inclined relative to the table,
- b) a girdle at which the gemstone has its largest transverse dimension, and
- c) a pavilion adjoining the girdle from below the girdle and having main pavilion facets around the girdle,
- the method comprising cutting the gemstone to provide an odd number of 7 main pavilion facets and a different number of main crown facets;
- and wherein the main pavilion facets have the same size and shape and adjoin the girdle along a side of the main pavilion facet.
A gemstone, comprising
- a) a crown having a flat table and main crown facets being arranged around the table and being inclined relative to the table,
- b) a girdle at which the gemstone has its largest transverse dimension, and
- c) a pavilion adjoining the girdle from below the girdle and having main pavilion facets around the girdle,
- characterized in that the main pavilion facets have the same size and shape and adjoin the girdle along a side of the main pavilion facet, and wherein the number of the main pavilion facets is odd and the number of the main crown facets is even.
Dependencies are inferred from the claim text.