Claims:WE CLAIM:
1. A gemstone (Fig 1) visually encompassing a heart shape (Fig 8, 15: AD) within, comprising an upper double crown table facet(A) having a plurality of Upper crown-1 facets (E ), equal number of upper crown -2 facets (F), approximately half the number of crown main facets ( G) and half the number of star facets (I) as upper crown -1 facet , the star facets bordering a central- table facet (J) ; a lower pavilion (C) with a culet (D) at its lower tip , a girdle (B) separating and distinguishing the upper crown table facet from the pavilion, girdle main facets (K) around the girdle, ,characterised by the pavilion having :
i. A plurality of pavilion facets ( Fig 1) below the girdle facet(B) appearing to be arranged on either side of an axis line(C’) (Fig 3, 10) traversing the pavilion along a horizontal plane , comprising of kite shaped pavilion main facets (O) emerging upwardly from the culet(D) having short arms (P) meeting at the culet and long arms (Q) meeting at 1st points (R ) at a girdle depth ranging 70 to 85 % , and the short arms and long arms of each pavilion main facet meeting at 2nd points(S) at a girdle depth ranging from 80 to 96% , even no of substantially triangular lower girdle facets (L) emerging downwardly from the girdle, substantially triangular short half facets(T) faceted from the lower girdle facets along a cable ( R’) joining the 1st points , the lower girdle and the corresponding short half facet having a common vertex at 2nd points ( S) , pointing towards the culet, pairs of short half facets alternating the long arms of the pavilion main facets; ( Fig 4, 11)
ii. a girdle facet angle (X) in the range of 30° to 60°, 1st pavilion short half angles (Y) along a cable (R’) joining the 1st points, being 0.01 ° to 8 ° less than the girdle facet angle , and the 2nd pavilion short half angles ( Z) along a cable (S’) joining the 2nd points of the pavilion main facets, such that the 2nd pavilion short half angle (Z) is 0.01° to 8° less than the 1st pavilion short half angle ;( Fig5,12)
iii. the pavilion facets (L,O, T) symmetrical to the corresponding pavilion facets across the axis line, and the girdle depth of the 1st point of one pair of symmetrical pavilion main facets being 0.5% to 10% less than the remainder pavilion main facets.

2. The gemstone as claimed in claim 1, which is round, with the upper double crown table facet (Fig 2) comprising of 16 upper crown -1 facets( E) , 16 upper crown -2 facets (F), 8 crown main facets( G) and 8 star facets (I) .

3. The gemstone as claimed in claim 1, which is heart shaped ( Fig 8) having a notch ( AA) and an oppositely located apex (AB) , and the axis line (AC’) passing through the apex and the notch, and the upper double crown table facet comprising of 16 upper crown -1 facets( E), 16 upper crown -2 facets(F) , 9 crown main facets(G) and 8 star facets (I).

4. The gemstone as claimed in claim 3 where in the crown main facets , comprise of a pair of crown heart -1 facet(G’), crown head -2 facet (G”), crown curve facet (G”’)and crown wing facet (G””), and one crown point facet (G””’) and the pavilion main facets (O) are symmetrical to the corresponding pavilion main facets across the axis line.

5. The gemstone as claimed in claim 2 and 4, where in the gemstone has 4 to 12 pavilion main facets(O ), and double the number of lower girdle facets (L) and short half facets (T) .

6. The heart shaped gemstone as claimed in claim 5 , with the girdle facet angle in the range of 43° to 48° , the angle variance between the 2nd pavilion short half angle and the 1st pavilion short half angle in the range of 38° to 42 ° is 0.3°to 5.0°, and the angle variance between the 1st pavilion short half angles and the girdle facet angles being in the range of 1° to 7°.(Fig 13)

7. The round gemstone as claimed in claim 5, with the girdle angle in the range of 40° to 46° and the angle variance between the 2nd pavilion short half angle and 1st pavilion short half angle is in the range of 0.5° to 5°, and the angle variance between the 1st pavilion short half angles and the girdle facet angles being in the range of 1° to 5°. (Fig6)

8. The gemstone as claimed in claim 6 and 7 , where in the gemstone has 4 pairs of symmetrical pavilion main facets ( O) and double the number of pairs of symmetrical lower girdle facets ( L) and short half facets (T) .

9. The gemstone as claimed in claim 8, with a pair of symmetrical small short half facets ( T8,T9) having one common side along the axis line, having sides opposite the vertex meet at a girdle depth approximately midway (V) between the 1st point and the 2nd point of the pavilion main facets nestling the small short half facets , and a second pair of symmetrical short half facets also having one common side along the same axis line, having a second common vertex (V’) at a common point on the cable ( R’) and axis line at a girdle depth equivalent to the girdle depth of the longest pavilion main (O) with a variance of not more than 15%.( Fig 4, 11).

10. The gemstone as claimed in claim 9, where in the 1st point of the pair of pavilion main facets (O3,O6) having the shortest girdle depth is immediately adjacent to the pavilion mains (O4,O5) nestling the small short half facets..

11. The gemstone as claimed in claim 10 , where in the gemstone is a diamond.

12. A method of cutting a round cut gemstone to encompass the shape of a heart ,(fig 15) from the gemstone (Fig.1) having an upper double crown table facet (A), a lower pavilion ( C) with a culet (D) at its tip and having an axis line ( AC)along a horizontal plane, and a girdle (B) separating and distinguishing the pavilion (C) from the upper double crown table facet, the crown table facet having a plurality of Upper crown-1 facets(E ), equal number of upper crown -2 facets(F) , and half the number of main crown facets(G) and star facets(I) , the star facets bordering a central- table face( J) ; girdle main facets (K) around the girdle, with at least four pairs of lower girdle facets (L) extending downwardly from the girdle to the culet(D) at a lower girdle angle (X) in the range of 30° to 60 °, cutting and polishing at least two pairs of symmetrical kite shaped pavilion main facets (O) having a pair of short arms (P) and long arms(Q) , from each pair of lower girdle facets(L) , such that the short arms (P) meet at the culet (D) , long arms meet at 1st points(R) at girdle depths ranging from 70 to 85 %, and the short arm and the long arm meet at 2nd points(S) at girdle depths ranging from 80% to 96%, and the common vertices of adjacent pairs of the lower girdle facets are at the girdle depth of the 2nd point(S) , further cutting, chiselling and polishing the lower girdle facet along a cable (R’) connecting the 1st points, to form 1st pavilion angles(Y) and substantially triangular short half facets (T), such that the 1st pavilion angles are at least 0.01 to 8.0° less than the lower girdle angle (X) , and the lower girdle facet and the corresponding short half facets have a common vertex at the respective 2nd points (S) pointing towards the culet, further cutting, chiselling and polishing the pavilion main facets along a cable (S’) joining the 2nd points to form 2nd pavilion short half angles, such that the 2nd pavilion short half angle is at least 0.01° to 8°less than the 1st pavilion angle, and the girdle depth of the 1st point one symmetrical pair of pavilion main facets is at least 0.5% to 10% less than the girdle depth of the 1st points of the remainder pavilion main facets.
13. The method as claimed in claim 12 , where in the gemstone is cut, chiselled and polished to have 4 symetrical pairs of pavilion main facets, 8 pairs of symmetrical lower girdle facets and 8 pairs of symmetrical short half facets, each facet in symmetry with the corresponding facet across the axis line, and the 1ST pavilion short half angles being 2° to 8.0° less than the lower girdle facet angle, and further the 2nd pavilion short half angle being 2 to 5 °less than the 1st pavilion short half angle.

14. A method of cutting a symmetrically shaped heart shaped gemstone with a notch and an apex joined by an axis line along a horizontal plane, to encompass a heart shape design within, the gemstone having a plurality of Upper crown-1 facets (E ), equal number of upper crown -2 facets (F), half the number of star facets (I) and half plus one number of crown main facets(G) , the star facets bordering a central- table facet (J); a lower pavilion with a culet at the lower tip , a girdle separating and distinguishing the table facet from the pavilion, girdle main facets around the girdle, with lower girdle facets extending downwardly to the culet from the girdle at a lower girdle angle in the range of 30° to 60 °, from each pair of lower girdle facets (L) cutting and polishing kite shaped pavilion main facets(O) emerging upwardly from the culet, such that the pavilion main facet, having a pair of short arms(P) and long arms (Q) , are symmetrical with the corresponding pavilion main facets (O) across the axis line (AC) , and the short arms meet at the culet (D), long arms meet at 1st points (R) at a facet depth in the range of of 70 to 85 %, and the short arm and the long arm meet at 2nd points (S) at a depth of 80% to 96%, and the common vertice of adjacent pairs of the lower girdle facets are at the facet depth of the 2nd point(S) , further cutting, chiselling and polishing the lower girdle facets along a cable joining the 1st points, to form 1st pavilion angles(X) and substantially triangular short half facets(T) , such that the 1st pavilion angles are at least 0.01 to 8° less than the lower girdle facet angles, and the lower girdle facets and the corresponding short half facets have a common vertice pointing towards the culet, further cutting, chiselling and polishing the pavilion main facets along a line joining the 2nd points to form 2nd pavilion short half angles, such that the 2nd pavilion angles are at least .01 to 8.00 °less than the 1st pavilion angle, forming an heart shape image along the horizontal plane of the gemstone.

15. The method as claimed in claim 14 , where in the gemstone is chiselled and cut to have 8 pavilion main facets, 16 lower girdle facets and 16 short half facets and further cut and chiselled such that the 1ST pavilion short half angles at 1st points with facet depth ranging from 80-84.5%, are 1 °to 7.° less than the lower girdle facet angle, and the 2nd pavilion short half angle at a facet depth of 88.5% to 91% is 0.025° to 3 °less than the 1st pavilion short half angle.

16. The method as claimed in claim 13 and 15 , with a pair of symmetrical adjacent small short half facets (T8,T9 ) with a common side along the axis line, further cut and polished to have sides opposite the vertex at the 2nd point converging at a girdle depth greater approximately midway between the girdle depth of the 1st point(R) and the 2nd point(S) of the pavilion main facets nestling the small short half facets and a second common vertex of a second pair of symmetrical short half facets also having one common side along the same axis line, being at a common point on the cable ( R’) and axis line ( C’) at a girdle depth equivalent to the girdle depth of the 1st point of the longest pavilion main facet (O) with a variance of not more than 15%, to form a heart shape design with notch(V) and apex(R’) .

17. The method as claimed in claim 16, where in the girdle depth of the 1st points of the symmetrical pair of pavilion main facets( O3, O6) adjacent to the pavilion main facets (O4,O5) nestling the small short half facets is least among other pavilion main facets.
, Description:The invention relates to a field of gemstones and more specifically to round cut and heart shaped gemstones, where in such gemstone encompasses the shape of a heart within its body.