Round-Cut Certified Diamond Inventory

IN STOCK
Certification # Stock # Carat Clarity Color Polish Symmetry Fluorescence Cut Class Price
 GIA #17459691 DB- 3.05ct VS-2 H EX VG None EX sold
 GIA #5141166800 DB-13911 2.69ct SI-1 H VG VG Medium Blue EX sold
 AGS #104056518001 DB-13920 2.05ct VS-1 I EX EX None   sold
 GIA #5141356690  DB-13921 2.03ct SI-1
H EX
 VG None
EX sold
 EGL #US18702001D DB-13944 2.03ct SI-2 F GD GD None   $11,500.00
 GIA #5141491645 DB-10879 1.53ct SI-1 E VG VG Strong Blue VG $13,800.00
 MGL #D1554 DB-13755
 1.51ct VS-2 J
 VG GD Weak Blue
 GD $10,500.00
 GIA #2135530688 DB-13539 1.42ct SI-1 H EX VG Strong Blue EX $12,000.00
 GIA #10115722 DB-13809 1.40ct VS-1 J VG VG None EX $9,200.00

GIA

Tiffany & Co.

 DB-12708 1.40ct VS-1 J
 VG VG None EX
 $9,200.00
 GIA #5141198316 DB-13799 1.32ct SI-2 I VG VG None EX sold

GIA

Tiffany & Co.

#2145485364

 DB-13943 1.31ct VS-1 I EX VG Faint EX $11,000.00
 GIA #1142198305 DB-12931 1.30ct SI-1 I VG VG None EX sold
 GIA #12539167 DB-13798 1.25ct SI-1 F EX EX None EX sold
 IGI #GT11004811 DB-13867 1.18ct VS-1 H VG VG None GD
 $6,750.00
 GIA #5141498512 DB-13797 1.12ct VS-1 I VG VG None EX $7,900.00
 GIA #2125982944 DB-13643
1.01ct VS-1 I VG VG None VG $6,900.00
 GIA #2145498322 DB-10210 1.00ct VVS-1 H VG GD None VG $9,150.00
 GIA #2135615252 DB-13782 .92ct VVS-2 G GD GD None VG $8,800.00
 GIA #2131644992 DB-13750 .90ct VS-2 K VG VG None VG $3,500.00
 GIA #1142477634 DB-13705 .90ct VS-1 I VG VG None VG $4,850.00
 GIA #2145356804 DB-13861 .87ct VS-1 H VG VG None VG $4,325.00
 GIA #2145506757 DB-13945 .81ct SI-2 F VG VG None VG $3,500.00
 GIA #1102230490 DB-13950 .80ct SI-2 F GD VG None VG $
 GIA #2145331207 DB-13862 .75ct VS-2 E GD GD None VG $4,250.00
 GIA #1142486794 DB-13871 .73ct VVS-1 G
VG VG
Strong Blue EX $
 GIA #1142349858 DB-13860 .72ct VVS-2 H GD GD None VG $3,750.00
 GIA #2135748470 DB-13801 .69ct VVS-2 I EX EX None EX $3,645.00
 GIA #2145380750 DB-13736 .65ct VS-2 F GD VG None VG $2,935.00
 GIA #2145490961 DB-13885 .57ct SI-1 H GD VG None VG $1,350.00
 GIA #5141502196 DB-13555 .55ct VS-2 D VG
GD
None
VG $
 GIA #12880288 DB-13981 .51ct VS-2 D EX EX None   $
 GIA #5141485766 DB-12407 .50ct VVS-1 D GD GD None GD $2,600.00
 
   
  
  
SOLD
Certification # Stock # Carat Clarity Color Polish Symmetry Fluorescence Cut Class Price
 MGL #D1550    2.11ct  SI-2  I  GD  GD  Medium Blue
  VG  $15,000.00
 IGI #32238957    2.05ct  I-1  G  GD  GD  None  VG  $8,000.00
 AGS #0007384404    2.04ct  SI-1  J  EX  EX  Negligible
 EX  $14,500.00
 MGL #D1538    2.01ct  SI-1  H  GD  GD  Strong Blue
  GD  $16,000.00
 EGL #US-51665008D    1.85ct  SI-2  K  VG  GD  Faint  VG  $7,000.00
 GemEx #SDG-11896    1.57ct  I-1  H  GD  GD  None  VG  $4,500.00
 GIA #6137477578    1.45ct  SI-2  G  GD  GD  None  VG  $9,500.00
 GIA #5131221425    1.43ct  SI-1  I  VG  EX  Faint  EX  $10,000.00
 GIA #1109147670    1.09ct  VS-2  I  EX  EX  None  EX  $8,000.00
 In House: 81   Faceted    .91ct  SI-2  J  VG  VG  Strong Blue
  VG  $3,000.00
 EGL #AT-400131    .81ct  SI-2  F  EX  EX  Slight  Ideal H&A's
  $2,500.00
 In House    .75ct  VS-2  I  VG  VG  None  VG  $2,200.00
 In House    .53ct  SI-2  F  GD  GD  None  VG  $1,300.00
 IGI #30632038    .46ct  SI-2  F  GD  GD  None  VG  $800.00
 
A Round Brilliant Cut Diamond is a Diamond or other Gemstone, cut in a particular form with numerous Facets so as to have exceptional brilliance. The shape resembles that of a cone and provides maximized light return through the top of the diamond.
 
Even with modern techniques, the cutting and polishing of a diamond crystal always results in a dramatic loss of weight; rarely it is less than 50%. The Round Brilliant Cut is preferred when the crystal is an octahedron, as often two stones may be cut from one such crystal. Oddly shaped crystals such as Macles are more likely to be cut in a Fancy Cut.
 
The Original Round Brilliant Cut was developed by Marcel Tolkowsky in 1919. The modern Round Brilliant consists of 58 Facets (or 57 is the Culet is excluded). Ordinarily today, Round Brilliants are cut in two pyramids placed base to base: 33 on the Crown (the top half above the middle/Girdle of the stone), truncated comparatively near its base by the table, and 25 on the Pavilion (the lower half below the girdle), which has only the apex cut off to form the Culet, around which 8 extra Facets are sometimes added. In recent decades, most Girdles are Faceted. Many Girdles have 32, 64, 80, or 96 Facets; these Facets are not counted in the total. While the Facet count is standard, the actual proportions (Crown height and angle, Pavilion depth, etc.) are not universally agreed upon. One may speak of the "American Cut" or the "Scandinavian Standard" to give a couple examples.
 
The relationship between the crown angle and the Pavilion Angle has the greatest effect on the look of the diamond. A slightly steep Pavilion Angle can be complemented by a shallower crown angle, and vice versa. Other proportions also affect the look of the Diamond:
 
  • The Table ratio is highly significant.
  • The length of the Lower Girdle Facets affects whether Hearts & Arrows can be seen in the stone, under certain viewers.
  • Most Round Brilliant Diamond have roughly the same Girdle thickness at all 16 "thick parts".
 

          Facet Proportions & Names
        

RoundChart.jpg

 

 

Figures 1 & 2 show the Facets of a Round Brilliant Cut Diamond

 

 

 

 

 

 

Figure 1 assumes that the "thick part of the Girdle" is the same thickness at all 16 "thick parts". It does not consider the effect of indexed upper Girdle Facets.

 

 

 

 

 

 

 

 

 

Figure 2 is adapted from Figure 37 of Marcel Tolkowsky's Diamond Design, which was published in 1919. Since 1919, the lower Girdle Facets have become longer. As a result, the Pavilion Main Facets have become narrower.