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10.39ct G SI1 Round Lab Grown Diamond

EX • G/SI1 • IGI LG623420092

Shape and cutting style on the report: Round brilliant

Certificate IGI LG623420092

Diamond specifications and retailer prices

From $3,667 NZD
$2,067 USD
As of November 1, 2026
Save $19,629 NZD (84%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $23,297 NZD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 10.39ct lab-grown round diamond

This 10.39ct lab-grown round sits in the over five carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG623420092 or 623420092. Listed at 18 retailers as of October 31, 2026, with prices from $3,667 to $23,297, a $19,629 spread on the same certified stone. Brilliant Earth lists it at $23,297. 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

10.39
Carat
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.5°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG623420092
Dimensions14.20 × 14.16 × 8.42 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
14.20 mm14.16 mm10.39 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG623420092
Side View
Table 58.0%Crown 32.5°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 59.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $23,297 NZD|Low: $3,520 NZD|High: $23,297 NZD|Avg: $6,428 NZD
Brilliant Earth
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
November 1, 2026
Retailer 12$3,667 NZD
Retailer 2$3,796 NZD
Retailer 11$3,989 NZD
Retailer 5$4,106 NZD
Retailer 8$4,253 NZD
Retailer 13$4,253 NZD
Retailer 4$4,551 NZD
Retailer 7$5,130 NZD
Retailer 9$5,781 NZD
Retailer 15$5,846 NZD
Retailer 16$6,205 NZD
Retailer 3$6,650 NZD
Retailer 10$6,725 NZD
Retailer 6$12,096 NZD
Retailer 14$13,364 NZD
Brilliant Earth$23,297 NZD

42 data points across 16 retailers

18 retailers$3,667 NZD to $23,297 NZD

A
Cheapest Retailer
-
$3,667 NZD
$2,067 USD
A
Retailer 2
-
$3,796 NZD
£1,684 GBP
View
A
Retailer 3
-
$3,989 NZD
$2,248 USD
View
A
Retailer 4
-
$4,106 NZD
$2,314 USD
View
Final sale: no returns
Retailer 5
-
$4,253 NZD
$2,397 USD
View
Price last confirmed 21 days ago
A
Retailer 6
-
$4,253 NZD
$2,397 USD
View
A
Retailer 7
-
$4,551 NZD
$2,565 USD
View
A
Retailer 8
-
$5,130 NZD
$2,891 USD
View
B+
Retailer 9
-
$5,781 NZD
£2,566 GBP
View
B+
Retailer 10
-
$5,846 NZD
$3,295 USD
View
B+
Retailer 11
-
$6,205 NZD
$3,497 USD
View
B+
Retailer 12
-
$6,650 NZD
$3,748 USD
View
B+
Retailer 13
-
$6,725 NZD
€3,610 EUR
View
Retailer 14
-
$11,052 NZD
$6,229 USD
View
Price last confirmed 39 days ago
B
Retailer 15
-
$12,096 NZD
$6,817 USD
View
B
Retailer 16
-
$13,364 NZD
$7,532 USD
View
B
Retailer 17
-
$14,878 NZD
$8,385 USD
View
Most Expensive
B
Brilliant Earth
20602535A · Oct 31
$23,297 NZD
$13,130 USD
View
17 more retailers have this diamond
Prices start from $3,667 NZDSave up to $19,629 NZD

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.

A
10.39ct Round
$3,667 NZD