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Cushion|Lab Grown|IGI

1.51ct H SI1 Cushion Lab Grown Diamond

GD • H/SI1 • IGI LG526259531

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG526259531

Diamond specifications and retailer prices

From $545 NZD
$307 USD
As of November 1, 2026
Save $1,871 NZD (77%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $2,416 NZD at MOH London · As of November 1, 2026
View at MOH London

About this 1.51ct lab-grown cushion diamond

This 1.51ct lab-grown cushion sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG526259531 or 526259531. Listed at 9 retailers as of November 1, 2026, with prices from $545 to $2,416, a $1,871 spread on the same certified stone. MOH London lists it at $2,416. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
H
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG526259531
Dimensions7.33 × 7.14 × 4.32 mm
L/W Ratio1.03
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 mm7.14 mm1.51 ctH / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG526259531
Side View
Table 63.5%Crown 33.9°Girdle: THN-MEDPavilion 40.9°Culet: NoneDepth 60.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $2,416 NZD|Low: $389 NZD|High: $2,445 NZD|Avg: $1,211 NZD|-1.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 7$545 NZD
Retailer 4$603 NZD
Retailer 9$859 NZD
Retailer 3$861 NZD
Retailer 6$997 NZD
Retailer 8$1,199 NZD
Retailer 10$1,224 NZD
Retailer 2$1,402 NZD
Retailer 5$1,721 NZD
MOH London$2,416 NZD

14 data points across 10 retailers

9 retailers$545 NZD to $2,416 NZD

B+
Cheapest Retailer
-
$545 NZD
$307 USD
Final sale: no returns
Retailer 2
-
$603 NZD
$340 USD
View
Price last confirmed 24 days ago
B+
Retailer 3
-
$859 NZD
$484 USD
View
B+
Retailer 4
-
$861 NZD
$485 USD
View
B+
Retailer 5
-
$997 NZD
$562 USD
View
B+
Retailer 6
-
$1,199 NZD
$676 USD
View
B+
Retailer 7
-
$1,402 NZD
$790 USD
View
B
Retailer 8
-
$1,721 NZD
$970 USD
View
Most Expensive
B
MOH London
LG526259531 · Nov 1
$2,416 NZD
£1,072 GBP
View
8 more retailers have this diamond
Prices start from $545 NZDSave up to $1,871 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.

B+
1.51ct Cushion
$545 NZD