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Marquise|Lab Grown|IGI

5.51ct E VS1 Marquise Lab Grown Diamond

EX • E/VS1 • IGI LG752586341

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG752586341

Diamond specifications and retailer prices

From £788 GBP
$1,056 USD
As of October 31, 2026
Save £4,018 GBP (84%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £9,434 GBP at Brilliant Earth · As of October 22, 2026
View at Brilliant Earth

About this 5.51ct lab-grown marquise diamond

This 5.51ct lab-grown marquise sits in the over five carat band, graded E colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG752586341 or 752586341. Listed at 15 retailers as of October 31, 2026, with a 510% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
E
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle30.1°
Pavilion angle37.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG752586341
Dimensions18.69 × 9.56 × 5.35 mm
L/W Ratio1.96
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
18.69 mm9.56 mm5.51 ctE / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG752586341
Side View
Table 61.0%Crown 30.1°Girdle: MED-STKPavilion 37.8°Culet: NoneDepth 56.0%

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 31
Current: £4,806 GBP|Low: £607 GBP|High: £9,725 GBP|Avg: £2,769 GBP|-50.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 7£788 GBP
Retailer 2£981 GBP
Retailer 5£1,209 GBP
Retailer 3£1,483 GBP
Retailer 4£1,658 GBP
Retailer 8£2,252 GBP
Retailer 6£2,531 GBP
Retailer 10£2,834 GBP
Retailer 9£4,243 GBP
Brilliant Earth£4,806 GBP

24 data points across 10 retailers

15 retailers£788 GBP to £4,806 GBP

Retailer 1
-
£704 GBP
$943 USD
Price last confirmed 21 days ago
A
Retailer 2
-
£788 GBP
$1,056 USD
View
Final sale: no returns
Retailer 3
-
£816 GBP
$1,094 USD
View
Price last confirmed 21 days ago
Retailer 4
-
£816 GBP
$1,094 USD
View
Price last confirmed 19 days ago
A
Retailer 5
-
£981 GBP
$1,315 USD
View
B+
Retailer 6
-
£1,209 GBP
$1,620 USD
View
A
Retailer 7
-
£1,483 GBP
€1,892 EUR
View
A
Retailer 8
-
£1,658 GBP
$2,222 USD
View
B+
Retailer 9
-
£2,252 GBP
View
Retailer 10
-
£2,295 GBP
$3,075 USD
View
Price last confirmed 21 days ago
B+
Retailer 11
-
£2,531 GBP
$3,391 USD
View
B+
Retailer 12
-
£2,834 GBP
SGD 5,132 SGD
View
Retailer 13
-
£4,243 GBP
$5,685 USD
View
Price last confirmed 25 days ago
B
Retailer 14
-
£4,806 GBP
$6,440 USD
View
Most Expensive
Brilliant Earth
16806716A · Oct 22
£9,434 GBP
$12,640 USD
View
Price under review
14 more retailers have this diamond
Prices start from £788 GBPSave up to £4,018 GBP

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
5.51ct Marquise
£788 GBP