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1.51ct J SI1 Round Lab Grown Diamond

EX • J/SI1 • IGI LG487172905

Shape and cutting style on the report: Round brilliant

Certificate IGI LG487172905

Diamond specifications and retailer prices

From $1,493 NZD
$840 USD
As of November 2, 2026
Save $6,290 NZD (81%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $7,783 NZD at MOH London · As of October 29, 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG487172905 or 487172905. Listed at 11 retailers as of October 29, 2026, with prices from $1,493 to $7,783, a $6,290 spread on the same certified stone. MOH London lists it at $7,783. 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
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.1°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG487172905
Dimensions7.45 × 7.43 × 4.47 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
7.45 mm7.43 mm1.51 ctJ / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG487172905
Side View
Table 61.5%Crown 32.1°Girdle: MediumPavilion 41.4°Culet: NoneDepth 60.1%

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 2
Current: $7,783 NZD|Low: $1,493 NZD|High: $7,844 NZD|Avg: $3,511 NZD|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 2$1,493 NZD
Retailer 3$2,078 NZD
Retailer 6$2,326 NZD
Retailer 4$2,410 NZD
Retailer 10$2,624 NZD
Retailer 7$2,719 NZD
Retailer 9$3,423 NZD
Retailer 5$3,827 NZD
Retailer 8$4,747 NZD
MOH London$7,783 NZD

13 data points across 10 retailers

11 retailers$1,493 NZD to $7,783 NZD

A
Cheapest Retailer
-
$1,493 NZD
$840 USD
B+
Retailer 2
-
$2,078 NZD
$1,169 USD
View
B+
Retailer 3
-
$2,259 NZD
$1,271 USD
View
B+
Retailer 4
-
$2,326 NZD
$1,309 USD
View
Final sale: no returns
B+
Retailer 5
-
$2,410 NZD
$1,356 USD
View
Retailer 6
-
$2,410 NZD
$1,356 USD
View
Price last confirmed 21 days ago
B+
Retailer 7
-
$2,719 NZD
$1,530 USD
View
B
Retailer 8
-
$3,827 NZD
$2,153 USD
View
B
Retailer 9
-
$4,516 NZD
$2,541 USD
View
B
Retailer 10
-
$4,747 NZD
$2,671 USD
View
Most Expensive
B
MOH London
LG487172905 · Oct 29
$7,783 NZD
£3,448 GBP
View
10 more retailers have this diamond
Prices start from $1,493 NZDSave up to $6,290 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
$1,493 NZD