Patent ID: 6158243
Filing Date: 2000-12-12
Classification: A44C,B44B

Abstract:
A stone (20), having an outer perimeter and having a number of facets comprising a crown (21) and a pavilion (23), said pavilion having a central culet, and a plurality of triangular-shaped facets having an apex at the culet and which widen from the culet towards the outer perimeter of the stone, said crown comprising a table (24), said crown having sides joining with said pavilion and forming, with said pavilion, directional facets:said table (24) defining a reversed trapezoidal figure having a widened upper part,said directional facets being oriented so as to concentrate brilliance towards two regions, on either side of said trapezoidal figure, said facets forming reflection planes such that when an observer inclines a reflection plane of said stone, the observer obtains a pattern of flapping wings, when looking inside said table, said facets further leaving a central location, under said crown, free from reflection, thus permitting an external cutting, within said central location, of two locations for separation of wings, a brilliance of said stone and of said facets permiting the appearance at a point of convergence between said pavilion and said locations for separation, giving said stone externally and internally the general shape of a butterfly.