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Cushion|Lab Grown|IGI

1.51ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG726545903

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG726545903

Diamond specifications and retailer prices

From $469 NZD
As of November 6, 2026
Save $2,580 NZD (85%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $3,049 NZD at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG726545903 or 726545903. Listed at 12 retailers as of November 6, 2026, with prices from $469 to $3,049, a $2,580 spread on the same certified stone. Brilliant Earth lists it at $3,049. 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
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle28.9°
Pavilion angle30.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG726545903
Dimensions8.56 × 5.76 × 3.49 mm
L/W Ratio1.49
Girdle conditionFaceted
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.56 mm5.76 mm1.51 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG726545903
Side View
Table 60.0%Crown 28.9°Girdle: MED-THKPavilion 30.9°Culet: LargeDepth 60.6%

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 6
Current: $3,049 NZD|Low: $469 NZD|High: $3,049 NZD|Avg: $1,133 NZD|+49.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 10$469 NZD
Retailer 8$521 NZD
Retailer 6$704 NZD
Retailer 5$864 NZD
Retailer 4$974 NZD
Retailer 9$1,111 NZD
Retailer 7$1,605 NZD
Retailer 2$1,881 NZD
Retailer 3$2,076 NZD
Brilliant Earth$3,049 NZD

43 data points across 10 retailers

12 retailers$469 NZD to $3,049 NZD

A
Cheapest Retailer
-
$469 NZD
Final sale: no returns
A
Retailer 2
-
$521 NZD
View
B+
Retailer 3
-
$704 NZD
View
A
Retailer 4
-
$841 NZD
View
A
Retailer 5
-
$864 NZD
View
A
Retailer 6
-
$974 NZD
View
B+
Retailer 7
-
$1,111 NZD
View
Retailer 8
-
$1,605 NZD
View
Price last confirmed 17 days ago
B
Retailer 9
-
$1,770 NZD
View
B
Retailer 10
-
$1,881 NZD
View
B
Retailer 11
-
$2,076 NZD
View
Most Expensive
B
Brilliant Earth
20664776A · Nov 6
$3,049 NZD
$1,690 USD
View
11 more retailers have this diamond
Prices start from $469 NZDSave up to $2,580 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 Cushion
$469 NZD