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Cushion|Lab Grown|IGI

5.51ct D VS1 Cushion Lab Grown Diamond

ID • D/VS1 • IGI LG826684802

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG826684802

Diamond specifications and retailer prices

From $3,770 USD
As of October 26, 2026
Save $3,140 USD (45%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $6,910 USD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 5.51ct lab-grown cushion diamond

This 5.51ct lab-grown cushion sits in the over five carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG826684802 or 826684802. Listed at 4 retailers as of October 26, 2026, with prices from $3,770 to $6,910, a $3,140 spread on the same certified stone. Brilliant Earth lists it at $6,910. 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

5.51
Carat
D
Color
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.5°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG826684802
Dimensions11.94 × 9.55 × 6.07 mm
L/W Ratio1.25
Girdle conditionFaceted
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.94 mm9.55 mm5.51 ctD / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG826684802
Side View
Table 61.0%Crown 39.5°Girdle: STK-THKPavilion 40.8°Culet: LargeDepth 63.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 26
Current: $6,910 USD|Low: $3,770 USD|High: $13,030 USD|Avg: $6,016 USD|-47.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
October 30, 2026
Retailer 4$3,770 USD
Retailer 2$4,201 USD
Retailer 3$6,684 USD
Brilliant Earth$6,910 USD

9 data points across 4 retailers

4 retailers$3,770 USD to $6,910 USD

B+
Cheapest Retailer
-
$3,770 USD
B+
Retailer 2
-
$4,201 USD
€4,001 EUR
View
B
Retailer 3
-
$6,684 USD
View
Most Expensive
B
Brilliant Earth
21728846A · Oct 30
$6,910 USD
View
3 more retailers have this diamond
Prices start from $3,770 USDSave up to $3,140 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.

B+
5.51ct Cushion
$3,770 USD