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Cushion|Lab Grown|IGI

3.51ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG749583773

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

Certificate IGI LG749583773

Diamond specifications and retailer prices

From $2,778 USD
As of October 29, 2026
Save $6,962 USD (71%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $9,740 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 3.51ct lab-grown cushion diamond

This 3.51ct lab-grown cushion sits in the three to five carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG749583773 or 749583773. Listed at 22 retailers as of October 29, 2026, with prices from $2,778 to $9,740, a $6,962 spread on the same certified stone. Brilliant Earth lists it at $9,740. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

3.51
Carat
E
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.6°
Pavilion angle31.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG749583773
Dimensions8.52 × 8.11 × 5.37 mm
L/W Ratio1.05
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.52 mm8.11 mm3.51 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG749583773
Side View
Table 64.0%Crown 38.6°Girdle: THK-VTKPavilion 31.4°Culet: NoneDepth 66.2%

Caratlytics Score

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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 29
Current: $9,740 USD|Low: $1,832 USD|High: $9,740 USD|Avg: $4,943 USD|+36.0%
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 30, 2026
Retailer 4$2,659 USD
Retailer 6$2,778 USD
Retailer 13$2,805 USD
Retailer 15$2,825 USD
Retailer 2$3,660 USD
Retailer 11$3,800 USD
Retailer 14$3,802 USD
Retailer 9$4,240 USD
Retailer 7$5,044 USD
Retailer 12$6,013 USD
Retailer 8$6,174 USD
Retailer 3$6,745 USD
Retailer 10$7,252 USD
Retailer 5$8,899 USD
Brilliant Earth$9,740 USD

45 data points across 15 retailers

22 retailers$2,778 USD to $9,740 USD

Retailer 1
-
$2,659 USD
Price last confirmed 19 days ago
A
Retailer 2
-
$2,778 USD
View
A
Retailer 3
-
$2,805 USD
View
Final sale: no returns
A
Retailer 4
-
$2,825 USD
View
A
Retailer 5
-
$3,072 USD
HK$24,000 HKD
View
A
Retailer 6
-
$3,660 USD
£2,882 GBP
View
A
Retailer 7
-
$3,800 USD
View
A
Retailer 8
-
$3,802 USD
View
A
Retailer 9
-
$4,240 USD
€4,038 EUR
View
A
Retailer 10
-
$4,505 USD
View
B+
Retailer 11
-
$5,044 USD
£3,972 GBP
View
Retailer 12
-
$6,013 USD
A$9,251 AUD
View
Price last confirmed 7 days ago
B+
Retailer 13
-
$6,174 USD
ZAR 99,736 ZAR
View
B+
Retailer 14
-
$6,600 USD
View
B+
Retailer 15
-
$6,745 USD
View
B+
Retailer 16
-
$7,098 USD
View
B+
Retailer 17
-
$7,252 USD
£5,710 GBP
View
B+
Retailer 18
-
$7,429 USD
View
B+
Retailer 19
-
$7,869 USD
View
B
Retailer 20
-
$8,899 USD
SGD 12,025 SGD
View
B
Retailer 21
-
$9,287 USD
View
Most Expensive
B
Brilliant Earth
16596317A · Oct 29
$9,740 USD
View
21 more retailers have this diamond
Prices start from $2,778 USDSave up to $6,962 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
3.51ct Cushion
$2,778 USD