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Round|Lab Grown|IGI

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 $2,943 AUD
$2,067 USD
As of November 1, 2026
Save $15,749 AUD (84%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $18,692 AUD 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 $2,943 to $18,692, a $15,749 spread on the same certified stone. Brilliant Earth lists it at $18,692. 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: $18,692 AUD|Low: $2,824 AUD|High: $18,692 AUD|Avg: $5,150 AUD
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$2,943 AUD
Retailer 2$3,046 AUD
Retailer 11$3,200 AUD
Retailer 5$3,294 AUD
Retailer 8$3,412 AUD
Retailer 13$3,412 AUD
Retailer 4$3,652 AUD
Retailer 7$4,116 AUD
Retailer 9$4,638 AUD
Retailer 15$4,691 AUD
Retailer 16$4,978 AUD
Retailer 3$5,336 AUD
Retailer 10$5,396 AUD
Retailer 6$9,705 AUD
Retailer 14$10,723 AUD
Brilliant Earth$18,692 AUD

43 data points across 16 retailers

18 retailers$2,943 AUD to $18,692 AUD

A
Cheapest Retailer
-
$2,943 AUD
$2,067 USD
A
Retailer 2
-
$3,046 AUD
£1,684 GBP
View
A
Retailer 3
-
$3,200 AUD
$2,248 USD
View
A
Retailer 4
-
$3,294 AUD
$2,314 USD
View
Final sale: no returns
Retailer 5
-
$3,412 AUD
$2,397 USD
View
Price last confirmed 21 days ago
A
Retailer 6
-
$3,412 AUD
$2,397 USD
View
A
Retailer 7
-
$3,652 AUD
$2,565 USD
View
A
Retailer 8
-
$4,116 AUD
$2,891 USD
View
B+
Retailer 9
-
$4,638 AUD
£2,566 GBP
View
B+
Retailer 10
-
$4,691 AUD
$3,295 USD
View
B+
Retailer 11
-
$4,978 AUD
$3,497 USD
View
B+
Retailer 12
-
$5,336 AUD
$3,748 USD
View
B+
Retailer 13
-
$5,396 AUD
€3,610 EUR
View
Retailer 14
-
$8,868 AUD
$6,229 USD
View
Price last confirmed 39 days ago
B
Retailer 15
-
$9,705 AUD
$6,817 USD
View
B
Retailer 16
-
$10,723 AUD
$7,532 USD
View
B
Retailer 17
-
$11,937 AUD
$8,385 USD
View
Most Expensive
B
Brilliant Earth
20602535A · Oct 31
$18,692 AUD
$13,130 USD
View
17 more retailers have this diamond
Prices start from $2,943 AUDSave up to $15,749 AUD

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
$2,943 AUD