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Round|Lab Grown|IGI

0.31ct F SI1 Round Lab Grown Diamond

EX • F/SI1 • IGI LG459129427

Shape and cutting style on the report: Round brilliant

Certificate IGI LG459129427

Diamond specifications and retailer prices

From $242 AUD
$170 USD
As of November 1, 2026
Save $1,161 AUD (83%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,403 AUD at MOH London · As of November 1, 2026
View at MOH London

About this 0.31ct lab-grown round diamond

This 0.31ct lab-grown round sits in the sub-half-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG459129427 or 459129427. Listed at 11 retailers as of November 1, 2026, with prices from $242 to $1,403, a $1,161 spread on the same certified stone. MOH London lists it at $1,403. 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

0.31
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle36.4°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG459129427
Dimensions4.34 × 4.38 × 2.63 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
4.34 mm4.38 mm0.31 ctF / SI1
OriginLab Grown
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG459129427
Side View
Table 61.5%Crown 36.4°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 60.4%

Caratlytics Score

How it works →
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: $1,403 AUD|Low: $232 AUD|High: $1,421 AUD|Avg: $514 AUD|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 5$242 AUD
Retailer 8$280 AUD
Retailer 4$299 AUD
Retailer 6$300 AUD
Retailer 2$534 AUD
Retailer 7$537 AUD
Retailer 3$616 AUD
MOH London$1,403 AUD

41 data points across 8 retailers

11 retailers$242 AUD to $1,403 AUD

A
Cheapest Retailer
-
$242 AUD
$170 USD
A
Retailer 2
-
$280 AUD
$197 USD
View
B+
Retailer 3
-
$299 AUD
$210 USD
View
Retailer 4
-
$300 AUD
$211 USD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
$300 AUD
$211 USD
View
B
Retailer 6
-
$534 AUD
£295 GBP
View
B
Retailer 7
-
$537 AUD
$377 USD
View
B
Retailer 8
-
$616 AUD
€412 EUR
View
B
Retailer 9
-
$698 AUD
£386 GBP
View
B
Retailer 10
-
$965 AUD
$678 USD
View
Most Expensive
B
MOH London
LG459129427 · Nov 1
$1,403 AUD
£776 GBP
View
10 more retailers have this diamond
Prices start from $242 AUDSave up to $1,161 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
0.31ct Round
$242 AUD