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1.51ct I SI1 Round Lab Grown Diamond

ID • I/SI1 • IGI LG492123241

Shape and cutting style on the report: Round brilliant

Certificate IGI LG492123241

Diamond specifications and retailer prices

From $1,494 NZD
As of November 5, 2026
Save $7,588 NZD (84%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $9,082 NZD at MOH London · As of November 5, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG492123241 or 492123241. Listed at 11 retailers as of November 5, 2026, with prices from $1,494 to $9,082, a $7,588 spread on the same certified stone. MOH London lists it at $9,082. 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
I
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG492123241
Dimensions7.33 × 7.36 × 4.57 mm
L/W Ratio1.00
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
7.33 mm7.36 mm1.51 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG492123241
Side View
Table 54.5%Crown 35.8°Girdle: THN-MEDPavilion 40.2°Culet: NoneDepth 62.2%

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: $9,082 NZD|Low: $1,494 NZD|High: $9,229 NZD|Avg: $4,098 NZD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 2$1,494 NZD
Retailer 3$2,444 NZD
Retailer 6$2,736 NZD
Retailer 4$2,834 NZD
Retailer 7$3,140 NZD
Retailer 9$3,878 NZD
Retailer 5$4,477 NZD
Retailer 8$5,283 NZD
MOH London$9,082 NZD

13 data points across 9 retailers

11 retailers$1,494 NZD to $9,082 NZD

A
Cheapest Retailer
-
$1,494 NZD
B+
Retailer 2
-
$2,444 NZD
View
B+
Retailer 3
-
$2,658 NZD
View
B+
Retailer 4
-
$2,736 NZD
View
Final sale: no returns
Retailer 5
-
$2,834 NZD
View
Price last confirmed 25 days ago
B+
Retailer 6
-
$2,834 NZD
View
B+
Retailer 7
-
$3,140 NZD
View
B
Retailer 8
-
$4,477 NZD
View
B
Retailer 9
-
$5,283 NZD
View
B
Retailer 10
-
$5,314 NZD
View
Most Expensive
B
MOH London
LG492123241 · Nov 5
$9,082 NZD
£4,020 GBP
View
10 more retailers have this diamond
Prices start from $1,494 NZDSave up to $7,588 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
$1,494 NZD