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Marquise|Lab Grown|IGI

1.75ct E IF Marquise Lab Grown Diamond

EX • E/IF • IGI LG591389369

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG591389369

Diamond specifications and retailer prices

From £794 GBP
$1,058 USD
As of October 27, 2026
Save £2,134 GBP (73%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £2,929 GBP at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 1.75ct lab-grown marquise diamond

This 1.75ct 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 LG591389369 or 591389369. Listed at 2 retailers as of October 27, 2026, with prices from £794 to £2,929, a £2,134 spread on the same certified stone. Brilliant Earth lists it at £2,929. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.75
Carat
E
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG591389369
Dimensions12.61 × 6.40 × 3.93 mm
L/W Ratio1.97
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
12.61 mm6.40 mm1.75 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG591389369
Side View
Table 57.0%Crown 35.4°Girdle: MediumPavilion 40°Culet: NoneDepth 61.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 27
Current: £2,929 GBP|Low: £630 GBP|High: £3,770 GBP|Avg: £1,987 GBP|+0.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
September 27, 2026
Retailer 2£794 GBP
Retailer 8£1,059 GBP
Retailer 9£1,318 GBP
Retailer 11£1,325 GBP
Retailer 10£1,363 GBP
Retailer 6£1,386 GBP
Retailer 4£1,642 GBP
Retailer 3£1,819 GBP
Retailer 5£2,782 GBP
Retailer 12£2,880 GBP
Brilliant Earth£2,929 GBP
Retailer 7£2,995 GBP

53 data points across 12 retailers

2 retailers£794 GBP to £2,929 GBP

A
Cheapest Retailer
-
£794 GBP
$1,058 USD
Final sale: no returns
Most Expensive
B
Brilliant Earth
18970879A · Oct 28
£2,929 GBP
$3,900 USD
View
1 more retailer has this diamond
Prices start from £794 GBPSave up to £2,134 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
1.75ct Marquise
£794 GBP