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WHAT ARE DIAMOND DIAMOND CERTIFICATES

- Types of Diamond Certificates

- The Difference Between Diamond Certificates

Laser Inscribed Diamonds

The Difference Between Diamond Certificates
At Belgium Diamonds we offer mainly diamonds with GIA, HRD and IGI Certificates which are considered the 3 major certification laboratories in the world. We also offer in-house certificates for smaller diamonds. However, many diamond vendors offer EGL and other local certificates. The tables below demonstrates the grading difference between the main certification labs. 

Rapnet - the Rapaport Diamond Trading Network found significant differences between laboratories grading the same diamonds. RapNet sent diamonds, from 0.33 carat to 1.62 carats, and of different qualities to six certification labotories for grading. The diamonds were sent to GIA, IGI, HRD, EGL USA, EGL Israel and EGL Hong Kong. While the results on some of the sample diamonds indicated some consistency in grading, there were significant variations on others. 

At Belgium Diamonds we are aware that certificates and lab grades are conducted by independent groups and in many cases determined by market trends. Thus, our in house gemologists inspect all diamonds to confirm diamond quality before shipping and are at hand for immediate consultations regarding diamond characteristics.

Check the tables below to better understand the grading variations between the labs:

Shape: Round
Carat size: 1.62

Lab GIA IGI HRD EGL USA EGL HK EGL Israel
Color E E E E D D
Clarity SI1 SI1 VS2 VS2 VS2 VS1
Cut EX I VG I EX EX
Polish EX EX EX VG EX EX
Symmetry EX EX VG VG EX EX
Fluorescence Slight Slight None None None None
 Grading the Graders, Jun 14, 2013 RAPAPORT - Diamonds.net

Shape: Round
Carat size: 0.33

Lab GIA IGI HRD EGL USA EGL HK EGL Israel
Color E E F E D D
Clarity VS1 VS1 VS1 VS1 SI1 VVS2
Cut VG VG VG VG EX VG
Polish VG VG VG G EX VG
Symmetry VG VG EX G EX VG
Fluorescence None None None None None None
Grading the Graders, Jun 14, 2013 RAPAPORT - Diamonds.net

Shape: Round
Carat size: 1.08

Lab GIA IGI HRD EGL USA EGL HK EGL Israel
Color D D D D D D
Clarity VS2 VS2 VS2 VS2 VS1 VS1
Cut G VG VG   VG VG
Polish G G VG G VG VG
Symmetry G G G VG VG VG
Fluorescence None None None None None None
Grading the Graders, Jun 14, 2013 RAPAPORT - Diamonds.net

Shape: Round
Carat size: 1.06

Lab GIA IGI HRD EGL USA EGL HK EGL Israel
Color G F F F E D
Clarity VS2 VS2 VS1 VS2 VS1 VS1
Cut VG VG VG VG  EX EX
Polish VG VG EX VG EX EX
Symmetry G G G VG EX EX
Fluorescence None None None None None None
Grading the Graders, Jun 14, 2013 RAPAPORT - Diamonds.net

Shape: Round
Carat size: 0.77

Lab GIA IGI HRD EGL USA EGL HK EGL Israel
Color I I I I G G
Clarity VVS1 VVS1 VVS1 VVS1 VVS1 VVS1
Cut EX I EX   EX EX
Polish VG VG EX G EX EX
Symmetry VG VG VG VG EX EX
Fluorescence None None None None None None
Grading the Graders, Jun 14, 2013 RAPAPORT - Diamonds.net

Shape: Round
Carat size: 0.90

Lab GIA IGI HRD EGL USA EGL HK EGL Israel
Color E E E E D D
Clarity VS1 VS1 VSI VSI VSI IF
Cut G G VG VG VG
Polish VG VG VG VG VG VG
Symmetry VG VG VG VG VG VG
Fluorescence Med Med Med Med None Slight
Grading the Graders, Jun 14, 2013 RAPAPORT - Diamonds.net

Shape: Round
Carat size: 1.01

Lab GIA IGI HRD EGL USA EGL HK EGL Israel
Color F F F E E D
Clarity I1 I1 SI2 SI2 SI1 SI1
Cut VG VG VG - EX EX
Polish VG VG G VG EX EX
Symmetry G G VG VG EX EX
Fluorescence None None Slt None None None
Grading the Graders, Jun 14, 2013 RAPAPORT - Diamonds.net
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