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Marquise|Lab Grown|IGI

1.71ct E IF Marquise Lab Grown Diamond

ID • E/IF • IGI LG806630081

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG806630081

Diamond specifications and retailer prices

From £412 GBP
$549 USD
As of October 29, 2026
Save £2,974 GBP (88%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £3,387 GBP at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 1.71ct lab-grown marquise diamond

This 1.71ct lab-grown marquise sits in the one-and-a-half to two carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG806630081 or 806630081. Listed at 17 retailers as of October 28, 2026, with prices from £412 to £3,387, a £2,974 spread on the same certified stone. Brilliant Earth lists it at £3,387. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.71
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.9°
Pavilion angle38.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG806630081
Dimensions12.75 × 6.21 × 3.72 mm
L/W Ratio2.05
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.75 mm6.21 mm1.71 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG806630081
Side View
Table 61.0%Crown 36.9°Girdle: MED-STKPavilion 38.3°Culet: NoneDepth 59.9%

Caratlytics Score

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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 29
Current: £710 GBP|Low: £412 GBP|High: £2,009 GBP|Avg: £1,041 GBP|-3.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
October 30, 2026
Retailer 15£412 GBP
Retailer 14£559 GBP
Retailer 5£698 GBP
Retailer 1£710 GBP
Retailer 9£759 GBP
Retailer 4£788 GBP
Retailer 13£794 GBP
Retailer 11£1,002 GBP
Retailer 8£1,063 GBP
Retailer 6£1,240 GBP
Retailer 2£1,445 GBP
Retailer 12£1,487 GBP
Retailer 10£1,494 GBP
Retailer 3£1,599 GBP
Retailer 7£1,946 GBP

20 data points across 15 retailers

17 retailers£412 GBP to £3,387 GBP

A
Cheapest Retailer
-
£412 GBP
$549 USD
Final sale: no returns
A
Retailer 2
-
£559 GBP
$745 USD
View
A
Retailer 3
-
£698 GBP
$930 USD
View
A
Retailer 4
-
£710 GBP
$946 USD
View
A
Retailer 5
-
£759 GBP
View
A
Retailer 6
-
£788 GBP
ZAR 16,959 ZAR
View
A
Retailer 7
-
£794 GBP
€1,007 EUR
View
A
Retailer 8
-
£1,002 GBP
$1,335 USD
View
A
Retailer 9
-
£1,063 GBP
A$2,177 AUD
View
A
Retailer 10
-
£1,240 GBP
$1,651 USD
View
B+
Retailer 11
-
£1,445 GBP
SGD 2,601 SGD
View
B+
Retailer 12
-
£1,487 GBP
$1,981 USD
View
B+
Retailer 13
-
£1,494 GBP
$1,989 USD
View
B+
Retailer 14
-
£1,599 GBP
$2,130 USD
View
Retailer 15
-
£1,946 GBP
View
Price last confirmed 9 days ago
Retailer 16
-
£2,153 GBP
A$4,411 AUD
View
Price last confirmed 21 days ago
Most Expensive
B
Brilliant Earth
20219477A · Oct 28
£3,387 GBP
$4,510 USD
View
16 more retailers have this diamond
Prices start from £412 GBPSave up to £2,974 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
1.71ct Marquise
£412 GBP