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1.51ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG816613431

Shape and cutting style on the report: Round brilliant

Certificate IGI LG816613431

Diamond specifications and retailer prices

From $363 NZD
As of November 5, 2026
Save $1,743 NZD (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $2,105 NZD at MOH London · As of November 1, 2026
View at MOH London

About this 1.51ct lab-grown round diamond

This 1.51ct lab-grown round sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG816613431 or 816613431. Listed at 15 retailers as of November 1, 2026, with prices from $363 to $2,105, a $1,743 spread on the same certified stone. MOH London lists it at $2,105. 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

1.51
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816613431
Dimensions7.35 × 7.31 × 4.51 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.35 mm7.31 mm1.51 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816613431
Side View
Table 57.0%Crown 35.1°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 61.5%

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 5
Current: $2,105 NZD|Low: $363 NZD|High: $2,131 NZD|Avg: $1,130 NZD|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 7$363 NZD
Retailer 8$451 NZD
Retailer 2$761 NZD
Retailer 9$781 NZD
Retailer 3$815 NZD
Retailer 5$1,299 NZD
Retailer 6$1,452 NZD
Retailer 4$1,822 NZD
MOH London$2,105 NZD

42 data points across 9 retailers

15 retailers$363 NZD to $2,105 NZD

A
Cheapest Retailer
-
$363 NZD
A
Retailer 2
-
$420 NZD
View
A
Retailer 3
-
$451 NZD
View
Retailer 4
-
$451 NZD
View
Price last confirmed 13 days ago
A
Retailer 5
-
$761 NZD
View
A
Retailer 6
-
$770 NZD
View
B+
Retailer 7
-
$781 NZD
View
A
Retailer 8
-
$815 NZD
View
B+
Retailer 9
-
$1,176 NZD
View
B+
Retailer 10
-
$1,299 NZD
View
B+
Retailer 11
-
$1,447 NZD
View
B+
Retailer 12
-
$1,452 NZD
View
B
Retailer 13
-
$1,542 NZD
View
B
Retailer 14
-
$1,822 NZD
View
Most Expensive
B
MOH London
LG816613431 · Nov 1
$2,105 NZD
£919 GBP
View
14 more retailers have this diamond
Prices start from $363 NZDSave up to $1,743 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
1.51ct Round
$363 NZD