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Marquise|Lab Grown|IGI

5.51ct E VS1 Marquise Lab Grown Diamond

ID • E/VS1 • IGI LG841640042

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG841640042

Diamond specifications and retailer prices

From £1,013 GBP
HK$10,600 HKD
As of October 31, 2026
Save £3,208 GBP (76%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £4,220 GBP at Rare Carat · As of October 28, 2026
View at Rare Carat

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 LG841640042 or 841640042. Listed at 11 retailers as of October 28, 2026, with prices from £1,013 to £4,220, a £3,208 spread on the same certified stone. Rare Carat lists it at £4,220. 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 angle33.7°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG841640042
Dimensions18.31 × 9.05 × 5.58 mm
L/W Ratio2.02
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
18.31 mm9.05 mm5.51 ctE / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG841640042
Side View
Table 65.0%Crown 33.7°Girdle: MED-STKPavilion 39.5°Culet: NoneDepth 61.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £4,220 GBP|Low: £1,013 GBP|High: £4,220 GBP|Avg: £2,005 GBP
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 7£1,013 GBP
Retailer 11£1,142 GBP
Retailer 2£1,322 GBP
Retailer 3£1,370 GBP
Retailer 6£1,389 GBP
Retailer 8£1,949 GBP
Retailer 5£2,921 GBP
Retailer 10£2,986 GBP
Retailer 9£3,153 GBP
Retailer 4£3,218 GBP
Rare Carat£4,220 GBP

21 data points across 11 retailers

11 retailers£1,013 GBP to £4,220 GBP

A
Cheapest Retailer
-
£1,013 GBP
HK$10,600 HKD
A
Retailer 2
-
£1,142 GBP
$1,530 USD
View
A
Retailer 3
-
£1,322 GBP
View
A
Retailer 4
-
£1,370 GBP
$1,835 USD
View
A
Retailer 5
-
£1,389 GBP
€1,773 EUR
View
B+
Retailer 6
-
£1,949 GBP
$2,611 USD
View
B+
Retailer 7
-
£2,921 GBP
View
B
Retailer 8
-
£2,986 GBP
$4,001 USD
View
B
Retailer 9
-
£3,153 GBP
$4,225 USD
View
B
Retailer 10
-
£3,218 GBP
A$6,633 AUD
View
Most Expensive
B
Rare Carat
KI0426400KF841 · Oct 28
£4,220 GBP
$5,655 USD
View
10 more retailers have this diamond
Prices start from £1,013 GBPSave up to £3,208 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
£1,013 GBP