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Marquise|Lab Grown|IGI

0.71ct E SI1 Marquise Lab Grown Diamond

ID • E/SI1 • IGI LG803661811

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG803661811

Diamond specifications and retailer prices

From £98 GBP
$130 USD
As of October 23, 2026
Save £293 GBP (75%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,015 GBP at MOH London · As of October 21, 2026
View at MOH London

About this 0.71ct lab-grown marquise diamond

This 0.71ct lab-grown marquise sits in the half to three-quarter carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG803661811 or 803661811. Listed at 16 retailers as of October 23, 2026, with a 300% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.71
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle34.4°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG803661811
Dimensions8.98 × 4.67 × 2.96 mm
L/W Ratio1.92
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.98 mm4.67 mm0.71 ctE / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG803661811
Side View
Table 62.0%Crown 34.4°Girdle: STK-THKPavilion 41.5°Culet: NoneDepth 63.4%

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 23
Current: £1,015 GBP|Low: £94 GBP|High: £1,030 GBP|Avg: £276 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 16
October 29, 2026
Retailer 15£98 GBP
Retailer 5£108 GBP
Retailer 14£113 GBP
Retailer 7£121 GBP
Retailer 11£128 GBP
Retailer 16£135 GBP
Retailer 9£202 GBP
Retailer 2£211 GBP
Retailer 13£230 GBP
Retailer 6£297 GBP
Retailer 10£298 GBP
Retailer 12£299 GBP
Retailer 8£335 GBP
Retailer 3£389 GBP
Retailer 4£390 GBP
MOH London£1,015 GBP

42 data points across 16 retailers

16 retailers£98 GBP to £390 GBP

A
Cheapest Retailer
-
£98 GBP
$130 USD
A
Retailer 2
-
£108 GBP
$144 USD
View
Final sale: no returns
A
Retailer 3
-
£113 GBP
$151 USD
View
A
Retailer 4
-
£121 GBP
$161 USD
View
A
Retailer 5
-
£128 GBP
$170 USD
View
A
Retailer 6
-
£135 GBP
HK$1,400 HKD
View
A
Retailer 7
-
£202 GBP
View
A
Retailer 8
-
£211 GBP
€267 EUR
View
B+
Retailer 9
-
£230 GBP
$306 USD
View
B+
Retailer 10
-
£297 GBP
$396 USD
View
B+
Retailer 11
-
£298 GBP
View
B+
Retailer 12
-
£299 GBP
$398 USD
View
B
Retailer 13
-
£335 GBP
SGD 602 SGD
View
B
Retailer 14
-
£389 GBP
$518 USD
View
B
Retailer 15
-
£390 GBP
$520 USD
View
Most Expensive
MOH London
LG803661811 · Oct 21
£1,015 GBP
View
Price last confirmed 8 days ago
15 more retailers have this diamond
Prices start from £98 GBPSave up to £293 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
0.71ct Marquise
£98 GBP