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1.51ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG818686567

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818686567

Diamond specifications and retailer prices

From $357 NZD
$201 USD
As of November 1, 2026
Save $1,714 NZD (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $2,071 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 LG818686567 or 818686567. Listed at 15 retailers as of November 1, 2026, with prices from $357 to $2,071, a $1,714 spread on the same certified stone. MOH London lists it at $2,071. 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 angle34.2°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818686567
Dimensions7.36 × 7.33 × 4.53 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.36 mm7.33 mm1.51 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818686567
Side View
Table 57.0%Crown 34.2°Girdle: MediumPavilion 40.8°Culet: NoneDepth 61.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $2,071 NZD|Low: $357 NZD|High: $2,096 NZD|Avg: $1,063 NZD|-1.1%
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 9$357 NZD
Retailer 11$444 NZD
Retailer 2$740 NZD
Retailer 12$768 NZD
Retailer 5$789 NZD
Retailer 6$804 NZD
Retailer 4$809 NZD
Retailer 7$1,143 NZD
Retailer 8$1,269 NZD
Retailer 3$1,518 NZD
Retailer 10$1,526 NZD
MOH London$2,071 NZD

44 data points across 12 retailers

15 retailers$357 NZD to $2,071 NZD

A
Cheapest Retailer
-
$357 NZD
$201 USD
A
Retailer 2
-
$413 NZD
$233 USD
View
Retailer 3
-
$444 NZD
$250 USD
View
Price last confirmed 8 days ago
A
Retailer 4
-
$444 NZD
$250 USD
View
A
Retailer 5
-
$740 NZD
€397 EUR
View
B+
Retailer 6
-
$768 NZD
$433 USD
View
A
Retailer 7
-
$789 NZD
£350 GBP
View
A
Retailer 8
-
$804 NZD
£357 GBP
View
A
Retailer 9
-
$809 NZD
$456 USD
View
B+
Retailer 10
-
$1,143 NZD
$644 USD
View
B+
Retailer 11
-
$1,269 NZD
$715 USD
View
B+
Retailer 12
-
$1,423 NZD
$802 USD
View
B
Retailer 13
-
$1,518 NZD
$856 USD
View
B
Retailer 14
-
$1,526 NZD
$860 USD
View
Most Expensive
B
MOH London
LG818686567 · Nov 1
$2,071 NZD
£919 GBP
View
14 more retailers have this diamond
Prices start from $357 NZDSave up to $1,714 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
$357 NZD