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Cushion|Lab Grown|IGI

4.51ct D VS1 Cushion Lab Grown Diamond

EX • D/VS1 • IGI LG726562220

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

Certificate IGI LG726562220

Diamond specifications and retailer prices

From $1,425 USD
As of October 29, 2026
Save $9,005 USD (86%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $10,430 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 4.51ct lab-grown cushion diamond

This 4.51ct lab-grown cushion sits in the three to five carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG726562220 or 726562220. Listed at 14 retailers as of October 29, 2026, with prices from $1,425 to $10,430, a $9,005 spread on the same certified stone. Brilliant Earth lists it at $10,430. 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

4.51
Carat
D
Color
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.7°
Pavilion angle42.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG726562220
Dimensions9.73 × 9.49 × 6.46 mm
L/W Ratio1.03
Girdle conditionFaceted
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.73 mm9.49 mm4.51 ctD / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG726562220
Side View
Table 54.0%Crown 37.7°Girdle: THK-VTKPavilion 42.5°Culet: LargeDepth 68.1%

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: $10,430 USD|Low: $1,425 USD|High: $10,750 USD|Avg: $3,665 USD|-3.0%
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
October 30, 2026
Retailer 10$1,425 USD
Retailer 14$1,477 USD
Retailer 9$1,650 USD
Retailer 3$1,843 USD
Retailer 2$2,082 USD
Retailer 13$2,339 USD
Retailer 4$2,624 USD
Retailer 7$3,145 USD
Retailer 5$3,566 USD
Retailer 12$4,239 USD
Retailer 11$4,405 USD
Retailer 8$4,773 USD
Retailer 6$5,185 USD
Brilliant Earth$10,430 USD

36 data points across 14 retailers

14 retailers$1,425 USD to $10,430 USD

A
Cheapest Retailer
-
$1,425 USD
Final sale: no returns
Retailer 2
-
$1,477 USD
View
Price last confirmed 20 days ago
A
Retailer 3
-
$1,650 USD
View
B+
Retailer 4
-
$1,843 USD
View
A
Retailer 5
-
$2,082 USD
£1,639 GBP
View
B+
Retailer 6
-
$2,339 USD
View
B+
Retailer 7
-
$2,624 USD
View
B+
Retailer 8
-
$3,145 USD
ZAR 50,804 ZAR
View
B
Retailer 9
-
$3,566 USD
£2,808 GBP
View
B
Retailer 10
-
$4,239 USD
View
B
Retailer 11
-
$4,405 USD
View
B
Retailer 12
-
$4,773 USD
£3,758 GBP
View
B
Retailer 13
-
$5,185 USD
View
Most Expensive
B
Brilliant Earth
20359331A · Oct 29
$10,430 USD
View
13 more retailers have this diamond
Prices start from $1,425 USDSave up to $9,005 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
4.51ct Cushion
$1,425 USD