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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 $302 NZD
$170 USD
As of November 1, 2026
Save $1,449 NZD (83%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,752 NZD 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 $302 to $1,752, a $1,449 spread on the same certified stone. MOH London lists it at $1,752. 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: $1,752 NZD|Low: $290 NZD|High: $1,774 NZD|Avg: $641 NZD|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 5$302 NZD
Retailer 8$350 NZD
Retailer 4$373 NZD
Retailer 6$375 NZD
Retailer 2$666 NZD
Retailer 7$670 NZD
Retailer 3$769 NZD
MOH London$1,752 NZD

41 data points across 8 retailers

11 retailers$302 NZD to $1,752 NZD

A
Cheapest Retailer
-
$302 NZD
$170 USD
A
Retailer 2
-
$350 NZD
$197 USD
View
B+
Retailer 3
-
$373 NZD
$210 USD
View
Retailer 4
-
$375 NZD
$211 USD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
$375 NZD
$211 USD
View
B
Retailer 6
-
$666 NZD
£295 GBP
View
B
Retailer 7
-
$670 NZD
$377 USD
View
B
Retailer 8
-
$769 NZD
€412 EUR
View
B
Retailer 9
-
$871 NZD
£386 GBP
View
B
Retailer 10
-
$1,205 NZD
$678 USD
View
Most Expensive
B
MOH London
LG459129427 · Nov 1
$1,752 NZD
£776 GBP
View
10 more retailers have this diamond
Prices start from $302 NZDSave up to $1,449 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
0.31ct Round
$302 NZD