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1.51ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG631466945

Shape and cutting style on the report: Round brilliant

Certificate IGI LG631466945

Diamond specifications and retailer prices

From $348 NZD
$196 USD
As of November 1, 2026
Save $1,671 NZD (83%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $2,019 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG631466945 or 631466945. Listed at 13 retailers as of November 1, 2026, with prices from $348 to $2,019, a $1,671 spread on the same certified stone. MOH London lists it at $2,019. 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
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle39.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG631466945
Dimensions7.46 × 7.40 × 4.44 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.46 mm7.40 mm1.51 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG631466945
Side View
Table 58.0%Crown 33.5°Girdle: MED-STKPavilion 39.9°Culet: NoneDepth 59.8%

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: $2,019 NZD|Low: $348 NZD|High: $2,030 NZD|Avg: $933 NZD|+2.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 3$348 NZD
Retailer 12$405 NZD
Retailer 11$431 NZD
Retailer 4$438 NZD
Retailer 7$752 NZD
Retailer 5$769 NZD
Retailer 2$788 NZD
Retailer 6$1,022 NZD
Retailer 9$1,277 NZD
Retailer 10$1,389 NZD
Retailer 8$1,393 NZD
MOH London$2,019 NZD

45 data points across 12 retailers

13 retailers$348 NZD to $2,019 NZD

A
Cheapest Retailer
-
$348 NZD
$196 USD
A
Retailer 2
-
$405 NZD
$228 USD
View
A
Retailer 3
-
$431 NZD
$243 USD
View
A
Retailer 4
-
$438 NZD
$247 USD
View
Final sale: no returns
Retailer 5
-
$486 NZD
$274 USD
View
Price last confirmed 7 days ago
B+
Retailer 6
-
$752 NZD
$424 USD
View
A
Retailer 7
-
$769 NZD
£341 GBP
View
A
Retailer 8
-
$788 NZD
£350 GBP
View
B+
Retailer 9
-
$1,022 NZD
$576 USD
View
B+
Retailer 10
-
$1,277 NZD
$720 USD
View
B+
Retailer 11
-
$1,389 NZD
$783 USD
View
B+
Retailer 12
-
$1,393 NZD
$785 USD
View
Most Expensive
B
MOH London
LG631466945 · Nov 1
$2,019 NZD
£896 GBP
View
12 more retailers have this diamond
Prices start from $348 NZDSave up to $1,671 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
$348 NZD