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Cushion|Lab Grown|IGI

2.51ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG727547270

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG727547270

Diamond specifications and retailer prices

From $613 NZD
HK$2,700 HKD
As of October 30, 2026
Save $3,361 NZD (85%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $3,974 NZD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 2.51ct lab-grown cushion diamond

This 2.51ct lab-grown cushion sits in the two to three carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG727547270 or 727547270. Listed at 15 retailers as of October 29, 2026, with prices from $613 to $3,974, a $3,361 spread on the same certified stone. Brilliant Earth lists it at $3,974. 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

2.51
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle32.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG727547270
Dimensions7.94 × 7.60 × 4.76 mm
L/W Ratio1.04
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.94 mm7.60 mm2.51 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG727547270
Side View
Table 61.0%Crown 35.6°Girdle: MED-STKPavilion 32.2°Culet: NoneDepth 62.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: $3,974 NZD|Low: $507 NZD|High: $3,974 NZD|Avg: $1,481 NZD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
October 31, 2026
Retailer 7$507 NZD
Retailer 9$613 NZD
Retailer 14$707 NZD
Retailer 15$843 NZD
Retailer 8$887 NZD
Retailer 4$937 NZD
Retailer 11$1,065 NZD
Retailer 6$1,100 NZD
Retailer 2$1,105 NZD
Retailer 5$1,402 NZD
Retailer 3$1,425 NZD
Retailer 10$1,784 NZD
Retailer 12$2,256 NZD
Retailer 13$3,061 NZD
Brilliant Earth$3,974 NZD

42 data points across 15 retailers

15 retailers$613 NZD to $3,974 NZD

A
Cheapest Retailer
-
$613 NZD
HK$2,700 HKD
Retailer 2
-
$707 NZD
£314 GBP
View
Price last confirmed 13 days ago
A
Retailer 3
-
$843 NZD
$475 USD
View
A
Retailer 4
-
$887 NZD
€476 EUR
View
B+
Retailer 5
-
$937 NZD
$528 USD
View
A
Retailer 6
-
$1,065 NZD
£473 GBP
View
A
Retailer 7
-
$1,100 NZD
$620 USD
View
A
Retailer 8
-
$1,105 NZD
A$958 AUD
View
A
Retailer 9
-
$1,402 NZD
$790 USD
View
B+
Retailer 10
-
$1,425 NZD
$803 USD
View
B+
Retailer 11
-
$1,784 NZD
SGD 1,359 SGD
View
B+
Retailer 12
-
$2,256 NZD
£1,001 GBP
View
B
Retailer 13
-
$2,963 NZD
$1,670 USD
View
Retailer 14
-
$3,061 NZD
$1,725 USD
View
Price last confirmed 12 days ago
Most Expensive
B
Brilliant Earth
16747996A · Oct 29
$3,974 NZD
$2,240 USD
View
14 more retailers have this diamond
Prices start from $613 NZDSave up to $3,361 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
2.51ct Cushion
$613 NZD