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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 $346 USD
HK$2,700 HKD
As of October 31, 2026
Save $1,894 USD (85%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $2,240 USD 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 $346 to $2,240, a $1,894 spread on the same certified stone. Brilliant Earth lists it at $2,240. 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
Color
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

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: Oct 31
Current: $2,240 USD|Low: $286 USD|High: $2,240 USD|Avg: $835 USD
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$286 USD
Retailer 10$346 USD
Retailer 15$399 USD
Retailer 3$475 USD
Retailer 2$496 USD
Retailer 4$528 USD
Retailer 12$600 USD
Retailer 6$620 USD
Retailer 9$623 USD
Retailer 5$790 USD
Retailer 8$791 USD
Retailer 11$1,006 USD
Retailer 13$1,271 USD
Retailer 14$1,725 USD
Brilliant Earth$2,240 USD

42 data points across 15 retailers

15 retailers$346 USD to $2,240 USD

A
Cheapest Retailer
-
$346 USD
HK$2,700 HKD
Retailer 2
-
$399 USD
£314 GBP
View
Price last confirmed 14 days ago
A
Retailer 3
-
$475 USD
View
A
Retailer 4
-
$496 USD
€472 EUR
View
B+
Retailer 5
-
$528 USD
View
A
Retailer 6
-
$600 USD
£473 GBP
View
A
Retailer 7
-
$620 USD
View
A
Retailer 8
-
$623 USD
A$958 AUD
View
A
Retailer 9
-
$790 USD
View
B+
Retailer 10
-
$791 USD
View
B+
Retailer 11
-
$1,006 USD
SGD 1,359 SGD
View
B+
Retailer 12
-
$1,271 USD
£1,001 GBP
View
B
Retailer 13
-
$1,670 USD
View
Retailer 14
-
$1,725 USD
View
Price last confirmed 12 days ago
Most Expensive
B
Brilliant Earth
16747996A · Oct 29
$2,240 USD
View
14 more retailers have this diamond
Prices start from $346 USDSave up to $1,894 USD

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
$346 USD