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Marquise|Lab Grown|IGI

1.65ct E IF Marquise Lab Grown Diamond

ID • E/IF • IGI LG820604760

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG820604760

Diamond specifications and retailer prices

From £369 GBP
$494 USD
As of October 29, 2026
Save £1,363 GBP (79%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,932 GBP at Novita Diamonds · As of October 8, 2026
View at Novita Diamonds

About this 1.65ct lab-grown marquise diamond

This 1.65ct 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 LG820604760 or 820604760. Listed at 15 retailers as of October 29, 2026, with a 370% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.65
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.7°
Pavilion angle38.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG820604760
Dimensions12.55 × 6.04 × 3.65 mm
L/W Ratio2.08
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.55 mm6.04 mm1.65 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG820604760
Side View
Table 62.0%Crown 39.7°Girdle: STK-THKPavilion 38.3°Culet: NoneDepth 60.4%

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 29
Current: £1,098 GBP|Low: £369 GBP|High: £1,779 GBP|Avg: £994 GBP|+3.6%
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
October 31, 2026
Retailer 2£369 GBP
Retailer 14£515 GBP
Retailer 7£641 GBP
Retailer 8£675 GBP
Retailer 5£706 GBP
Retailer 13£713 GBP
Retailer 11£925 GBP
Retailer 10£951 GBP
Retailer 1£1,098 GBP
Retailer 9£1,328 GBP
Retailer 12£1,338 GBP
Retailer 3£1,509 GBP
Retailer 6£1,598 GBP
Retailer 4£1,732 GBP

22 data points across 14 retailers

15 retailers£369 GBP to £1,732 GBP

A
Cheapest Retailer
-
£369 GBP
$494 USD
Final sale: no returns
A
Retailer 2
-
£515 GBP
$690 USD
View
A
Retailer 3
-
£641 GBP
$859 USD
View
A
Retailer 4
-
£675 GBP
View
A
Retailer 5
-
£706 GBP
ZAR 15,283 ZAR
View
A
Retailer 6
-
£713 GBP
€910 EUR
View
A
Retailer 7
-
£925 GBP
$1,239 USD
View
A
Retailer 8
-
£951 GBP
A$1,961 AUD
View
A
Retailer 9
-
£1,098 GBP
$1,471 USD
View
A
Retailer 10
-
£1,328 GBP
$1,780 USD
View
A
Retailer 11
-
£1,338 GBP
$1,793 USD
View
B+
Retailer 12
-
£1,509 GBP
View
B+
Retailer 13
-
£1,598 GBP
$2,141 USD
View
B+
Retailer 14
-
£1,732 GBP
SGD 3,136 SGD
View
Most Expensive
Novita Diamonds
cert_820604760 · Oct 8
£1,932 GBP
A$3,982 AUD
View
Price last confirmed 22 days ago
14 more retailers have this diamond
Prices start from £369 GBPSave up to £1,363 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
1.65ct Marquise
£369 GBP