gia new cut grade
GIA New Cut Grade System Starts: Jan. 1, 2006!
found at diamondtalk.com
Finally, after 15 years of research, it's here! http://facetware.gia.edu/
The Gemological Institute of America (GIA) will be issuing its new Diamond
Cut Grading System reports on January 1, 2006, for round brilliant cut diamonds ONLY,
D-to-Z in Color and Flawless-to I-3 in Clarity. GIA's new reports will show
color, clarity, and carat weight, but now will also include face-up cut quality;
Excellent, Very Good, Good, Fair, Poor.
GIA is also making available its Facetware (TM) cut estimator tool for assessing
diamond cut quality. The tool requires user input for total depth, table size,
crown angle, pavilion angle, star length, lower-half (lower-girdle facet)
length, girdle thickness, and culet size, as well as the diamond's polish and
symmetry grades. Available free for use it can be found here: www.diamondcut.gia.edu.
This is an extremely informative useful tool and tutorial and should be used and
read by all consumers.
Assumptions Regarding the Software
 | The
predicted cut grade generated by the Facetware™
Cut Estimator (the “Software”) provides an approximate prediction
of the overall cut grade that a particular standard round brilliant
diamond would receive from GIA based on GIA’s examination and
measurement of the diamond’s proportions and other limiting parameters.
| The actual
overall cut grade received from GIA for a diamond may differ from that
predicted by the Software for the following reasons:
 | The
diamond’s actual proportions (e.g., the crown angle of the diamond)
or parameters (e.g., the symmetry of the diamond) as determined by GIA
are different than the proportions or parameters for the diamond as
input into or assumed by the Software.
| The
diamond has been manufactured using non-standard brillianteering such
that the diamond is significantly “painted” or “dug-out”
(i.e., the diamond has its upper- and/or lower-half facets fashioned
at tilt angles different than those traditionally used for standard
round brilliant diamonds).
| The
measurement accuracy and tolerances of different measurement
methodologies and optical devices used to measure a diamond’s
proportions or parameters may differ from those used by GIA.
| The
displayed girdle thickness and/or total depth (when not entered by the
user) is derived from other proportions entered by the user. In
some cases, this may lead to girdle thickness and/or total depth
values that are different than the actual values of the particular
diamond because the entered values are rounded and/or are converted
from verbal descriptions (i.e., culet size is very small, small,
medium, etc.). In addition, the estimated girdle thickness
displayed by the Software is not determined by the Girdle Min or
Girdle Max descriptions chosen by the user, rather the estimated
girdle thickness is calculated from the other rounded proportions of
the diamond. |
| | |
| The Software
is intended to calculate predicted cut grades for standard round brilliant
diamonds on GIA’s D-to-Z scale of color only.
| The
predicted cut grade is not a valuation, appraisal or guarantee and it is
not a warranty or representation of the diamond’s final cut grade as
determined by GIA. The predicted cut grade may not be referred to as
any of the foregoing.
| The
predicted cut grade is not a representation or warranty by GIA regarding
the overall cut grade that a particular round brilliant diamond would
receive from GIA based on the diamond’s proportions and other
parameters.
| Proportion
ranges shown in the Software represent those most typically seen in the
trade. Predicted cut grades for diamonds with proportions or
parameters outside these ranges are not available.
| The Software
is intended for use with round brilliant diamond sizes 0.18 carats and
larger.
| The Software
is provided “AS IS” and GIA makes no warranties or representations to
you regarding the Software or any estimated cut grade generated by
the Software.
| Use of the
Software is subject to all the terms and conditions in your terms of use
agreement with GIA related to the Software, including without limitation
the disclaimers of warranty, exclusion of certain types of damages, limits
on liability, and restrictions regarding removing, modifying or obscuring
any information or notices appearing on any screen or on any report or
other output from the Software. |
| | | | | | | |
>38.5 million proportion data sets. Meaning the basis for this tool is a
combination of that many parameters.
* 2,300 stone examined.
* 70,000 observations
| |
|
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