The 8 Quality Criteria

1
The 8 Quality Criteria

• Private Diamond Club

2
The 8 Quality Criteria

• While the beauty of an visual attraction to a
  precisely cut stone can vary from one person to
  another, the actual value is based on well
  defined international standards.

3
(No Transcript)
4
1. CARAT (THE WEIGHT)

•  1 CARAT EQUALS 0,2 GRAM

(please note that the actual size may vary due to
different screen resolutions) The price per carat
is the not the same regardless of the weight of
the stone i.e. that a 2 carat stone price is
much higher than 2 stones of 1 carat each, 7
other criteria being the same. In other words,
the higher the weight of a stone, the higher the
price per carat is.  
5
2. CLARITY
Clarity grades are determined by the size,
position, brightness and number of
inclusions. Private Diamond Club only sells
diamonds ( loose or set as a jewel ) with clarity
grade from IF to SI2  and in no case lower
gradations such as P1 - P2 ...
6
3. COLOR 
(Please note that this image is only meant to
show the different shades, real diamonds can look
different) Private Diamond Club only sells
diamonds (loose or set as a jewel) with Color
between D to H and in no case lower color stones
such as I - J. ...
7
4. SHAPE
The most common shape is the round one or
"brilliant cut". With 57 facets it is the form
that returns the most light and is the best
selling and most expensive. Other shapes called
"fantasy" are used in jewelry as the princess
cut, heart, marquise, emerald cut, drop, cushion,
oval etc. ....
8
5. PROPORTIONS 

• Each diamond shape must meet specific
  characteristics of proportions between its
  different facets to reflect and diffract light
  optimally.
• Private Diamond Club only sells diamonds (alone
  or set on a jewel) whose proportions are
  "Excellent" or "Very good". With lower
  gradations, the value of the diamond drops from
  10 to 30.

9
(No Transcript)
10
6. SYMMETRY

• Similarly, the dimensions of facets and angles
  they form between themselves must be perfectly
  balanced to give the stone its maximum
  brightness.
• Private Diamond Club only sells diamonds (alone
  or set on a jewel) whose symmetry is "Excellent"
  or "Very good". With lower gradations, the value
  of the diamond drops from 10 to 30.

11
7. FINISH

• No imperfections resulting from the size, no
  trace of rough diamond on the facets must not
  stand to avoid any obstacles in the path of the
  light.
• Private Diamond Club only sells diamonds (alone
  or set on a jewel) whose finish is "Excellent" or
  "Very good". With lower gradations, the value of
  the diamond drops from 10 to 30.

12
8. FLUORESCENCE
Contrary to what one might think, the most common
diamonds are fluorescent and the rarest are
not. Private Diamond Club only sells diamonds
(alone or set on a jewel) whose Fluorescence is
"Nil" or " Faint". With lower gradations, the
value of the diamond drops from 10 to 30.
13
CONCLUSION

• The higher is the rank of the stone in all of
  these categories, the greater is its value.
  Official certificates (issued by HRD, GIA or
  IGI), which must accompany each diamond, refer to
  these eight quality criteria.
• The certification of the diamonds is the best way
  to guarantee the purchaser the authenticity and
  quality of the diamond.
• We emphasize that the 4 criteria " 4 C's" are not
  sufficient to characterize a diamond  and it is
  of major importance to specify the gradations of
  the 4 other quality criteria which are, alas, too
  often ignored.