This
diamond cut grading system was originally developed by Robert
M. Shipley, known as the "Father of Gemology in America." Mr.
Shipley was the founder of both the American Gem Society and
the Gemological Institute of America.
Under
this system, the cut grade of a diamond is graded on a scale
from 0 (ideal) to 10 (very poor) based on Table %,Crown Angle,
Pavilion Depth, Pavilion Angle, Polish, Symmetry, Girdle Thickness
and Culet size. The cut grade of the diamond is based on it's
lowest rating. For example, if a diamond has a rating of "5"(Fair)
for the crown angle and a rating "0" or ideal on all of the
other cut elements, the cut grade is "5" or Fair. In order to
be considered "ideal" cut, a diamond has to receive a rating
of "0" on every element, as defined below:
A.G.S. "000" IDEAL CUT (Note: AGS grades diamonds from 0 to 10
on each factor, with "0" being "ideal")
Table: 52.4-57.5% (AGS "0")
Crown Angle: 33.7-35.8 (AGS " 0")
Pavilion Depth: 42.2%-43.8%(AGS "0")
Polish/Symmetry: Ideal (which is roughly equivalent to G.I.A.'s
Very Good or Excellent)
Girdle Thickness: Thin, Medium or Slightly Thick
Culet Size: None, Very Small,Small,Medium
You
will generally pay 15% more for an AGS "000" Ideal cut
diamond than for a diamond with a good, or very good cut grade
(i.e., AGS 2-3). Those with cut grades of 4 and below will generally
sell for between 25%-50% below the cost of ideal cut stones.
After
the "0" cut grade, AGS certificates assign, the remainder of
the cut grades based on how much they deviate from the "ideal".
The system is a little to complicated to describe here. A brief
summary is as follows:
AGS
0 (or 000) IDEAL CUT
AGS
1 EXCELLENT
AGS
2 VERY GOOD
AGS
3-4 GOOD
AGS
5-7 FAIR
AGS
8-10 POOR
|
GIA
classifies diamonds using four cut grades:
G.I.A.'s
CLASS I (the top cut grade, resembling the "Ideal Cut"): have
a 53%-60% table; "Very Good" or "Excellent" Polish and Symmetry;
a 34-35 degree crown angle; and a 43% pavilion depth ( rounded
to the nearest 1/2%).
Additionally,
G.I.A. Class I and A.G.S. Ideal Cut diamonds must meet the other
cut criteria described under "G.I.A. Certs." For girdle thickness,
culet size, etc. You generally pay 15% more for
a G.I.A. Class I cut grade or an A.G.S. Ideal Cut than for a similar
diamond with a Class II cut grade.
G.I.A.'s
CLASS II ("International Fine Trade Cut" or very well cut
stones): have a 61%-64% tables; a 32-34 degree crown angle; a
42.0%-42.5% or 43.5%-44.0% pavilion depth (when rounded to the
nearest 1/2%); at least "Good" Polish and Symmetry; in addition
to meeting the criteria for girdle thickness, culet size, etc.
described under "G.I.A. Certs."
G.I.A.'s
CLASS III ("US Domestic Average Cut") Diamonds generally have
a 65%-70% table; a 30-32 degree crown angle; a 41%-41.5% or 44.5%-46%
pavilion depth; and "Fair" Polish and Symmetry. Other measurements
may also fall outside of those prescribed above. These diamonds
typically discount for 10% to 30% less than the
Class II cut grade.
G.I.A.'s
CLASS IV: ("Below Average Beauty/Durability) typically discount
for 30% to 50% less than the Class II cut grade.
|
Carat
Weight, Color & Clarity: 2.00 G SI1 or
H VS2
Approximate Dimonz Price: $23,850
Approx. Dimonz Price Per CT: $11,925
Carat Weight, Color & Clarity: 2.00 H SI1
Approximate Dimonz Price : $19,000
Approx. Dimonz Price Per Carat: $9,500
Carat
Weight: 1.70-1.99
Sell for approximately 10%-12% more per carat than 1.50 carat
diamonds of the same color and clarity.
Carat
Weight, Color & Clarity: 1.50 G VS2
Approximate Dimonz Price: $13,850
Approx. Dimonz Price Per Carat: $9,235
Carat
Weight, Color & Clarity: 1.50 G SI1 or
H VS2
Approximate Dimonz Price: $12,500
Approx. Dimonz Price Per Carat: $8,335
Carat
Weight, Color & Clarity: 1.50 H SI1
Approximate Dimonz Price: $11,250
Approx. Dimonz Price Per Carat: $7,500
Carat
Weight, Color & Clarity: 1.50 I VS2
Approximate Dimonz Price: $10,850
Approx. Dimonz Price Per Carat: $7,235
Carat
Weight: 1.30-1.49
Sell for approximately 10%-12% more per carat than 1.25 carat
diamonds of the same color and clarity.
Carat
Weight, Color & Clarity: 1.25 G VS2
Approximate Dimonz Price: $9,250
Approx. Dimonz Price Per Carat: $7,400
Carat
Weight, Color & Clarity: 1.25 G SI1 or
H VS2
Approximate Dimonz Price: $7,950
Approx. Dimonz Price Per Carat: $6,360
Carat
Weight, Color & Clarity: 1.25 I VS2
Approximate Dimonz Price : $6,750
Approx. Dimonz Price Per Carat: $5,400
Carat
Weight: 1.07-1.17
Sell for approximately the same price per carat as one carat
diamonds of the same color and clarity. Although these stones
appear significantly larger than 1 carat diamonds, the price
per carat is generally the same, unlike other intermediate sizes
which demand a premium (e.g., .90-.99 carats or 1.75-1.99 carats).
This is because very few people request one and a tenth
or one and an eighth carat diamonds.
Carat
Weight, Color & Clarity: 1.00 G VS2
Approximate Dimonz Price: $6,900
Approx. Dimonz Price Per Carat: $6,900
Carat
Weight, Color & Clarity: 1.00 G SI1 or
H VS2
Approximate Dimonz Price : $6,250
Approx. Dimonz Price Per Carat: $6,250
Carat
Weight, Color & Clarity: 1.00 H SI1
Approximate Dimonz Price: $5,750
Approx. Dimonz Price Per Carat: $5,850
Carat
Weight, Color & Clarity: 1.00 I VS2
Approximate Dimonz Price: $5,100
Approx. Dimonz Price Per Carat: $5,100
Carat
Weight: .90-.99
Prices for stones in this range are not listed because they
are relatively inconsistent, depending on availability and other
factors. In the .94 to .99 carat range, prices move closer to
those for 1.00 carat stones.
Carat
Weight: .83-.89
Sell for approximately 8% more per carat than .75 carat diamonds
of the same color and clarity.
Carat
Weight, Color & Clarity: .75 FVS1 or G
VVS2
Approximate Dimonz Price: $3,600
Approx. Dimonz Price Per Carat: $4,800
Carat
Weight, Color & Clarity: .75 F VS2 or G
VS1
Approximate Dimonz Price: $3,450
Approx. Dimonz Price Per Carat: $4,600
Carat
Weight, Color & Clarity: .75 G VS2
Approximate Dimonz Price: $3,150
Approx. Dimonz Price Per Carat: $4,200
Carat
Weight, Color & Clarity: .75 G SI1 or H
VS2
Approximate Dimonz Price: $2,985
Approx. Dimonz Price Per Carat: $3,980
Carat
Weight, Color & Clarity: .75 H SI1
Approximate Dimonz Price: $2,850
Approx. Dimonz Price Per Carat: $3,800
Carat
Weight, Color & Clarity: .75 I VS2
Approximate Dimonz Price : $2,750
Approx. Dimonz Price Per Carat: $3,665
Carat
Weight: .60-.69
Sell for approximately 8-10%% more per carat than .50 carat
diamonds of the same color and clarity.
Carat Weight, Color & Clarity: .50
G VS2
Approximate Dimonz Price: $1,750
Approx. Dimonz Price Per Carat: $3,500
Carat
Weight, Color & Clarity: .50 G SI1 or H
VS2
Approximate Dimonz Price: $1,585
Approx. Dimonz Price Per Carat: $3,170
Carat
Weight, Color & Clarity: .50 H SI1
Approximate Dimonz Price: $1,485
Approx. Dimonz Price Per Carat: $2,970
Carat
Weight, Color & Clarity: .50 I VS2
Approximate Dimonz Price: $1,450
Approx. Dimonz Price Per Carat: $2,900
|
Carat
Weight, Color & Clarity: 2.00 G SI1 or H
VS2
Approximate Dimonz Price: $21,000
Approx. Dimonz Price Per CT: $10,500
Carat
Weight, Color & Clarity: 2.00 H SI1
Approximate Dimonz Price : $17,850
Approx. Dimonz Price Per Carat: $8,925
Carat
Weight: 1.70-1.99
Sell for approximately 10%-12% more per carat than 1.50
carat diamonds of the same color and clarity.
Carat
Weight, Color & Clarity: 1.50 G VS2
Approximate Dimonz Price: $12,500
Approx. Dimonz Price Per Carat: $8,335
Carat
Weight, Color & Clarity: 1.50 G SI1 or H
VS2
Approximate Dimonz Price: $11,250
Approx. Dimonz Price Per Carat: $7500
Carat
Weight, Color & Clarity: 1.50 H SI1
Approximate Dimonz Price: $9,750
Approx. Dimonz Price Per Carat: $6,500
Carat
Weight, Color & Clarity: 1.50 I VS2
Approximate Dimonz Price: $9,500
Approx. Dimonz Price Per Carat: $6,335
Carat
Weight: 1.30-1.49
Sell for approximately 10%-12% more per carat than 1.25
carat diamonds of the same color and clarity.
Carat
Weight, Color & Clarity: 1.25 G VS2
Approximate Dimonz Price: $8,450
Approx. Dimonz Price Per Carat: $6,760
Carat
Weight, Color & Clarity: 1.25 G SI1 or H
VS2
Approximate Dimonz Price: $7,250
Approx. Dimonz Price Per Carat: $5,800
Carat
Weight, Color & Clarity: 1.25 I VS2
Approximate Dimonz Price : $5,950
Approx. Dimonz Price Per Carat: $4,760
Carat
Weight: 1.07-1.17
Sell for approximately the same price per carat as one carat diamonds
of the same color and clarity. Although these stones appear significantly
larger than 1 carat diamonds, the price per carat is generally
the same, unlike other intermediate sizes which demand a premium
(e.g., .90-.99 carats or 1.75-1.99 carats). This is because very
few people request one and a tenth or one and an eighth
carat diamonds.
Carat
Weight, Color & Clarity: 1.00 G VS2
Approximate Dimonz Price: $6,250
Approx. Dimonz Price Per Carat: $6,250
Carat
Weight, Color & Clarity: 1.00 G SI1 or H
VS2
Approximate Dimonz Price : $5,785
Approx. Dimonz Price Per Carat: $5,785
Carat
Weight, Color & Clarity: 1.00 H SI1
Approximate Dimonz Price: $5,350
Approx. Dimonz Price Per Carat: $5,350
Carat
Weight, Color & Clarity: 1.00 I VS2
Approximate Dimonz Price: $4,685
Approx. Dimonz Price Per Carat: $4,685
Carat
Weight: .90-.99
Prices for stones in this range are not listed because they are
relatively inconsistent, depending on availability and other factors.
In the .94 to .99 carat range, prices move closer to those for
1.00 carat stones.
Carat
Weight: .83-.89
Sell for approximately 8% more per carat than .75 carat diamonds
of the same color and clarity.
Carat
Weight, Color & Clarity: .75 FVS1 or G VVS2
Approximate Dimonz Price: $3,300
Approx. Dimonz Price Per Carat: $4,400
Carat
Weight, Color & Clarity: .75 F VS2 or G VS1
Approximate Dimonz Price: $2,950
Approx. Dimonz Price Per Carat: $3,935
Carat
Weight, Color & Clarity: .75 G VS2
Approximate Dimonz Price: $2,800
Approx. Dimonz Price Per Carat: $3,735
Carat
Weight, Color & Clarity: .75 G SI1 or H VS2
Approximate Dimonz Price: $2,685
Approx. Dimonz Price Per Carat: $3,580
Carat
Weight, Color & Clarity: .75 H SI1
Approximate Dimonz Price: $2,450
Approx. Dimonz Price Per Carat: $3,265
Carat
Weight, Color & Clarity: .75 I VS2
Approximate Dimonz Price: $2,385
Approx. Dimonz Price Per Carat: $3,180
Carat Weight: .60-.69
Sell for approximately 8-10% more per carat than .50 carat diamonds
of the same color and clarity.
Carat Weight, Color & Clarity: .50
G VS2
Approximate Dimonz Price: $1,600
Approx. Dimonz Price Per Carat: $3,200
Carat
Weight, Color & Clarity: .50 G SI1 or H VS2
Approximate Dimonz Price: $1,485
Approx. Dimonz Price Per Carat: $2,970
Carat
Weight, Color & Clarity: .50 H SI1
Approximate Dimonz Price: $1,385
Approx. Dimonz Price Per Carat: $2,770
Carat
Weight, Color & Clarity: .50 I VS2
Approximate Dimonz Price: $1,385
Approx. Dimonz Price Per Carat: $2,700
|