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Cushion|Lab Grown|IGI

4.51ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG846664763

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG846664763

Diamond specifications and retailer prices

From $7,916 USD
As of November 2, 2026
Save $17,726 USD (69%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $25,642 USD at With Clarity · As of November 2, 2026
View at With Clarity

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 FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG846664763 or 846664763. Listed at 4 retailers as of November 2, 2026, with prices from $7,916 to $25,642, a $17,726 spread on the same certified stone. With Clarity lists it at $25,642. 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
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle36.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG846664763
Dimensions10.64 × 8.89 × 6.01 mm
L/W Ratio1.20
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
10.64 mm8.89 mm4.51 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846664763
Side View
Table 59.0%Crown 34.1°Girdle: MED-THKPavilion 36.2°Culet: NoneDepth 67.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 2
Current: $7,916 USD|Low: $7,916 USD|High: $25,642 USD|Avg: $13,885 USD
Retailer 1
Retailer 2
Retailer 3
With Clarity
November 2, 2026
Retailer 1$7,916 USD
Retailer 3$8,124 USD
Retailer 2$10,874 USD
With Clarity$25,642 USD

2 data points across 4 retailers

4 retailers$7,916 USD to $25,642 USD

A
Cheapest Retailer
-
$7,916 USD
A
Retailer 2
-
$8,124 USD
View
B+
Retailer 3
-
$10,874 USD
£8,562 GBP
View
Most Expensive
B
With Clarity
846664763 · Nov 2
$25,642 USD
View
3 more retailers have this diamond
Prices start from $7,916 USDSave up to $17,726 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
$7,916 USD