Radiant|Lab Grown|IGI

6.55ct E SI1 Radiant Lab Grown Diamond

ID • E/SI1 • IGI LG840647726

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG840647726

Diamond specifications and retailer prices

From $3,534 USD
As of October 24, 2026
17 retailers carry this diamond
Most expensive: $8,930 USD at Helzberg Diamonds · As of October 13, 2026
View at Helzberg Diamonds

About this 6.55ct lab-grown radiant diamond

This 6.55ct lab-grown radiant sits in the over five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG840647726 or 840647726. Listed at 17 retailers as of October 24, 2026. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

6.55
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.4°
Pavilion angle33°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840647726
Dimensions14.14 × 9.02 × 5.95 mm
L/W Ratio1.57
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
14.14 mm9.02 mm6.55 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840647726
Side View
Table 66.0%Crown 44.4°Girdle: MED-STKPavilion 33°Culet: NoneDepth 66.0%

Caratlytics Score

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B
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Price History

Last verified: Oct 24
Current: $8,930 USD|Low: $878 USD|High: $8,930 USD|Avg: $2,502 USD
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
October 22, 2026
Retailer 17$878 USD
Retailer 7$955 USD
Retailer 4$984 USD
Retailer 13$1,019 USD
Retailer 11$1,053 USD
Retailer 12$1,109 USD
Retailer 15$1,195 USD
Retailer 10$1,468 USD
Retailer 19$1,509 USD
Retailer 9$1,551 USD
Retailer 14$1,582 USD
Retailer 16$2,266 USD
Retailer 2$2,864 USD
Retailer 6$3,420 USD
Retailer 18$3,534 USD
Retailer 3$3,536 USD
Retailer 5$3,839 USD
Retailer 8$4,035 USD
Helzberg Diamonds$8,930 USD

15 data points across 19 retailers

17 retailers

Retailer 1
-
$878 USD
Price last confirmed 8 days ago
Retailer 2
-
$955 USD
View
Price last confirmed 9 days ago
Retailer 3
-
$1,019 USD
View
Price last confirmed 7 days ago
Retailer 4
-
$1,053 USD
View
Price last confirmed 17 days ago
Retailer 5
-
$1,109 USD
£873 GBP
View
Price last confirmed 7 days ago
Retailer 6
-
$1,195 USD
View
Price last confirmed 6 days ago
Retailer 7
-
$1,468 USD
View
Price last confirmed 8 days ago
Retailer 8
-
$1,509 USD
View
Price last confirmed 8 days ago
Retailer 9
-
$1,582 USD
£1,246 GBP
View
Price last confirmed 7 days ago
Retailer 10
-
$2,266 USD
View
Price last confirmed 8 days ago
Retailer 11
-
$2,864 USD
View
Price last confirmed 7 days ago
Retailer 12
-
$3,420 USD
SGD 4,621 SGD
View
Price last confirmed 8 days ago
B
Retailer 13
-
$3,534 USD
View
Retailer 14
-
$3,536 USD
View
Price last confirmed 8 days ago
Retailer 15
-
$3,839 USD
£3,023 GBP
View
Price last confirmed 8 days ago
Retailer 16
-
$4,035 USD
View
Price last confirmed 11 days ago
Most Expensive
Helzberg Diamonds
ZXZOKGMKNNIM · Oct 13
$8,930 USD
View
Price last confirmed 16 days ago
16 more retailers have this diamond
Prices start from $3,534 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B
6.55ct Radiant
$3,534 USD