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Marquise|Lab Grown|IGI

5.51ct E VS1 Marquise Lab Grown Diamond

ID • E/VS1 • IGI LG841609854

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG841609854

Diamond specifications and retailer prices

From £753 GBP
$1,009 USD
As of October 31, 2026
Save £4,061 GBP (84%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £4,814 GBP at Brilliant Earth · As of October 31, 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 LG841609854 or 841609854. Listed at 21 retailers as of October 31, 2026, with prices from £753 to £4,814, a £4,061 spread on the same certified stone. Brilliant Earth lists it at £4,814. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.9°
Pavilion angle39.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG841609854
Dimensions18.30 × 9.00 × 5.40 mm
L/W Ratio2.03
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
18.30 mm9.00 mm5.51 ctE / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG841609854
Side View
Table 65.0%Crown 32.9°Girdle: VTK-ETKPavilion 39.1°Culet: NoneDepth 60.0%

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: £4,814 GBP|Low: £753 GBP|High: £9,434 GBP|Avg: £1,867 GBP|-49.0%
Brilliant Earth
Retailer 2
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Retailer 6
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Retailer 21
October 31, 2026
Retailer 6£753 GBP
Retailer 14£766 GBP
Retailer 16£848 GBP
Retailer 11£852 GBP
Retailer 12£853 GBP
Retailer 5£911 GBP
Retailer 20£1,114 GBP
Retailer 15£1,148 GBP
Retailer 13£1,202 GBP
Retailer 19£1,432 GBP
Retailer 2£1,582 GBP
Retailer 18£1,586 GBP
Retailer 10£1,598 GBP
Retailer 21£1,737 GBP
Retailer 4£1,927 GBP
Retailer 9£2,252 GBP
Retailer 7£2,443 GBP
Retailer 17£2,662 GBP
Retailer 3£2,713 GBP
Retailer 8£4,187 GBP
Brilliant Earth£4,814 GBP

27 data points across 21 retailers

21 retailers£753 GBP to £4,814 GBP

A
Cheapest Retailer
-
£753 GBP
$1,009 USD
Final sale: no returns
Retailer 2
-
£766 GBP
$1,026 USD
View
Price last confirmed 24 days ago
A
Retailer 3
-
£848 GBP
View
Retailer 4
-
£852 GBP
$1,142 USD
View
Price last confirmed 19 days ago
Retailer 5
-
£853 GBP
$1,143 USD
View
Price last confirmed 20 days ago
A
Retailer 6
-
£911 GBP
$1,220 USD
View
A
Retailer 7
-
£1,114 GBP
$1,493 USD
View
B+
Retailer 8
-
£1,148 GBP
$1,538 USD
View
A
Retailer 9
-
£1,202 GBP
View
A
Retailer 10
-
£1,432 GBP
€1,827 EUR
View
A
Retailer 11
-
£1,582 GBP
A$3,262 AUD
View
A
Retailer 12
-
£1,586 GBP
ZAR 34,339 ZAR
View
Retailer 13
-
£1,598 GBP
$2,141 USD
View
Price last confirmed 19 days ago
A
Retailer 14
-
£1,737 GBP
$2,328 USD
View
B+
Retailer 15
-
£1,927 GBP
$2,582 USD
View
Retailer 16
-
£2,252 GBP
View
Price last confirmed 8 days ago
B+
Retailer 17
-
£2,443 GBP
$3,273 USD
View
B+
Retailer 18
-
£2,662 GBP
View
B+
Retailer 19
-
£2,713 GBP
$3,635 USD
View
B
Retailer 20
-
£4,187 GBP
$5,610 USD
View
Most Expensive
B
Brilliant Earth
21795140A · Oct 31
£4,814 GBP
$6,450 USD
View
20 more retailers have this diamond
Prices start from £753 GBPSave up to £4,061 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
£753 GBP