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Cushion|Lab Grown|IGI

5.51ct F SI1 Cushion Lab Grown Diamond

VG • F/SI1 • IGI LG833639458

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG833639458

Diamond specifications and retailer prices

From €1,859 EUR
£1,642 GBP
As of November 2, 2026
Save €2,771 EUR (60%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: €4,629 EUR at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 5.51ct lab-grown cushion diamond

This 5.51ct lab-grown cushion sits in the over five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG833639458 or 833639458. Listed at 8 retailers as of October 31, 2026, with prices from €1,859 to €4,629, a €2,771 spread on the same certified stone. Taylor and Hart lists it at €4,629. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

5.51
Carat
F
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.2°
Pavilion angle38.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG833639458
Dimensions13.56 × 8.76 × 6.02 mm
L/W Ratio1.55
Girdle conditionFaceted
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
13.56 mm8.76 mm5.51 ctF / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG833639458
Side View
Table 52.0%Crown 40.2°Girdle: MED-STKPavilion 38.7°Culet: LargeDepth 68.7%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: €1,859 EUR|Low: €1,319 EUR|High: €4,629 EUR|Avg: €2,848 EUR|-0.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Taylor and Hart
November 2, 2026
Retailer 5€1,319 EUR
Retailer 1€1,859 EUR
Retailer 2€2,019 EUR
Retailer 4€2,088 EUR
Retailer 7€2,192 EUR
Retailer 3€4,261 EUR
Retailer 6€4,418 EUR
Taylor and Hart€4,629 EUR

40 data points across 8 retailers

8 retailers€1,859 EUR to €4,629 EUR

Retailer 1
-
€1,319 EUR
$1,479 USD
Price last confirmed 20 days ago
B
Retailer 2
-
€1,859 EUR
£1,642 GBP
View
B
Retailer 3
-
€2,019 EUR
$2,265 USD
View
B
Retailer 4
-
€2,088 EUR
$2,342 USD
View
B
Retailer 5
-
€2,192 EUR
$2,458 USD
View
Retailer 6
-
€4,261 EUR
£3,763 GBP
View
Price last confirmed 14 days ago
B
Retailer 7
-
€4,418 EUR
SGD 6,696 SGD
View
Most Expensive
B
Taylor and Hart
URVBW3B · Oct 31
€4,629 EUR
$5,192 USD
View
7 more retailers have this diamond
Prices start from €1,859 EURSave up to €2,771 EUR

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
€1,859 EUR