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0.31ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG459193779

Shape and cutting style on the report: Round brilliant

Certificate IGI LG459193779

Diamond specifications and retailer prices

From $302 NZD
$170 USD
As of November 1, 2026
Save $1,447 NZD (83%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $1,749 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 LG459193779 or 459193779. Listed at 10 retailers as of November 1, 2026, with prices from $302 to $1,749, a $1,447 spread on the same certified stone. MOH London lists it at $1,749. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG459193779
Dimensions4.31 × 4.33 × 2.67 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
4.31 mm4.33 mm0.31 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG459193779
Side View
Table 58.0%Crown 35.3°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 61.9%

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: $1,749 NZD|Low: $289 NZD|High: $1,771 NZD|Avg: $618 NZD|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 4$302 NZD
Retailer 8$337 NZD
Retailer 7$350 NZD
Retailer 5$374 NZD
Retailer 9$502 NZD
Retailer 2$665 NZD
Retailer 6$669 NZD
Retailer 3$768 NZD
MOH London$1,749 NZD

41 data points across 9 retailers

10 retailers$302 NZD to $1,749 NZD

A
Cheapest Retailer
-
$302 NZD
$170 USD
A
Retailer 2
-
$337 NZD
$190 USD
View
A
Retailer 3
-
$350 NZD
$197 USD
View
Retailer 4
-
$374 NZD
$211 USD
View
Price last confirmed 8 days ago
A
Retailer 5
-
$374 NZD
$211 USD
View
B+
Retailer 6
-
$665 NZD
£295 GBP
View
B+
Retailer 7
-
$669 NZD
$377 USD
View
B+
Retailer 8
-
$768 NZD
€412 EUR
View
B
Retailer 9
-
$1,203 NZD
$678 USD
View
Most Expensive
B
MOH London
LG459193779 · Nov 1
$1,749 NZD
£776 GBP
View
9 more retailers have this diamond
Prices start from $302 NZDSave up to $1,447 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