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0.31ct G SI1 Round Lab Grown Diamond

EX • G/SI1 • IGI LG459129380

Shape and cutting style on the report: Round brilliant

Certificate IGI LG459129380

Diamond specifications and retailer prices

From $299 AUD
$210 USD
As of October 31, 2026
Save $1,014 AUD (77%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $1,313 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG459129380 or 459129380. Listed at 5 retailers as of October 31, 2026, with prices from $299 to $1,313, a $1,014 spread on the same certified stone. MOH London lists it at $1,313. 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
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle33.6°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG459129380
Dimensions4.38 × 4.36 × 2.65 mm
L/W Ratio1.00
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
4.38 mm4.36 mm0.31 ctG / SI1
OriginLab Grown
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG459129380
Side View
Table 58.0%Crown 33.6°Girdle: THN-MEDPavilion 40.9°Culet: NoneDepth 60.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 31
Current: $1,313 AUD|Low: $299 AUD|High: $1,329 AUD|Avg: $628 AUD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 1, 2026
Retailer 4$299 AUD
Retailer 2$493 AUD
Retailer 5$508 AUD
Retailer 3$586 AUD
MOH London$1,313 AUD

43 data points across 5 retailers

5 retailers$299 AUD to $1,313 AUD

A
Cheapest Retailer
-
$299 AUD
$210 USD
B+
Retailer 2
-
$493 AUD
£273 GBP
View
B
Retailer 3
-
$508 AUD
$357 USD
View
B
Retailer 4
-
$586 AUD
€392 EUR
View
Most Expensive
B
MOH London
LG459129380 · Nov 1
$1,313 AUD
£726 GBP
View
4 more retailers have this diamond
Prices start from $299 AUDSave up to $1,014 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
$299 AUD