Page 122 - 瑰丽珠宝与翡翠

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March 20, 2023

DIAMOND TYPE CLASSIFICATION FOR GIA DIAMOND ORIGIN REPORT #6224866098

Scientists classify diamonds into two main
"types" - type I and type II - based on the
presence or absence of nitrogen which
can replace carbon atoms in a diamond's
atomic structure. These two diamond
types can be distinguished on the basis of
differences in their chemical and physical
properties. Type II diamonds contain little
if any nitrogen and they are subdivided
into two groups (IIa and IIb) both of which
are quite rare (less than 2% of all gem
diamonds).

According to the records of the GIA Laboratory, the 15.31 carat Pear Brilliant diamond
described in GIA Diamond Origin Report #6224866098 has been determined to be a type
IIa diamond. Type IIa diamonds are the most chemically pure type of diamond and often
have exceptional optical transparency. Type IIa diamonds were first identified as
originating from India (particularly from the Golconda region) but have since been
recovered in all major diamond-producing regions of the world.

Among famous gem diamonds, the 530.20 carat Cullinan I and the 105.60 carat Koh-i-noor
are examples of type IIa.

The information sp ecific to the arti cle described in this document (“Information”) is a part of the GIA Report referenced herein (the “Report”) as if such Information was
included in such Report. The Inform ation was obtained using the techniques and equipment used by GIA at the time of ex amination. Neither the Inform ation nor the Report is
a guaran tee or valu ation. For additional inform ation and important limit ations and disclaimers, pl ease see GIA.edu/terms or call +1 800 421 7250 or +1 760 603 4500.
The limit ations and disclaimers on the Report and in the client agreement with GIA g overning the Report apply to the Inform ation. By requesting GIA
to provide this Inform ation, you agree that you will not provide it to any person or e ntity without also providing the Report (or a copy of the Report).
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