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1.31ct F SI1 Round Lab Grown Diamond

EX • F/SI1 • IGI LG459132430

Shape and cutting style on the report: Round brilliant

Certificate IGI LG459132430

Diamond specifications and retailer prices

From $501 AUD
As of November 6, 2026
Save $1,322 AUD (73%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $1,822 AUD at MOH London · As of November 5, 2026
View at MOH London

About this 1.31ct lab-grown round diamond

This 1.31ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG459132430 or 459132430. Listed at 7 retailers as of November 5, 2026, with prices from $501 to $1,822, a $1,322 spread on the same certified stone. MOH London lists it at $1,822. 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

1.31
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG459132430
Dimensions7.00 × 6.96 × 4.30 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.00 mm6.96 mm1.31 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG459132430
Side View
Table 58.0%Crown 35.7°Girdle: ThickPavilion 40.3°Culet: NoneDepth 61.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: $1,822 AUD|Low: $413 AUD|High: $1,850 AUD|Avg: $847 AUD|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 4$413 AUD
Retailer 7$501 AUD
Retailer 5$702 AUD
Retailer 3$771 AUD
Retailer 2$857 AUD
Retailer 6$878 AUD
MOH London$1,822 AUD

41 data points across 7 retailers

7 retailers$501 AUD to $1,822 AUD

Retailer 1
-
$413 AUD
Price last confirmed 13 days ago
A
Retailer 2
-
$501 AUD
View
B+
Retailer 3
-
$702 AUD
View
B+
Retailer 4
-
$771 AUD
View
B+
Retailer 5
-
$857 AUD
View
B+
Retailer 6
-
$878 AUD
View
Most Expensive
B
MOH London
LG459132430 · Nov 5
$1,822 AUD
£986 GBP
View
6 more retailers have this diamond
Prices start from $501 AUDSave up to $1,322 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
1.31ct Round
$501 AUD