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Marquise|Lab Grown|IGI

2.51ct E IF Marquise Lab Grown Diamond

ID • E/IF • IGI LG836638868

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG836638868

Diamond specifications and retailer prices

From £799 GBP
$1,070 USD
As of October 30, 2026
Save £2,437 GBP (75%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £3,235 GBP at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 2.51ct lab-grown marquise diamond

This 2.51ct lab-grown marquise sits in the two to three carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG836638868 or 836638868. Listed at 17 retailers as of October 30, 2026, with prices from £799 to £3,235, a £2,437 spread on the same certified stone. Taylor and Hart lists it at £3,235. 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

2.51
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle30.9°
Pavilion angle42.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG836638868
Dimensions14.86 × 6.86 × 4.38 mm
L/W Ratio2.17
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
14.86 mm6.86 mm2.51 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG836638868
Side View
Table 62.0%Crown 30.9°Girdle: STK-THKPavilion 42.1°Culet: NoneDepth 63.8%

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 30
Current: £3,141 GBP|Low: £766 GBP|High: £3,813 GBP|Avg: £1,856 GBP|-11.0%
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
Taylor and Hart
November 1, 2026
Retailer 10£799 GBP
Retailer 6£869 GBP
Retailer 4£893 GBP
Retailer 11£926 GBP
Retailer 9£1,056 GBP
Retailer 7£1,341 GBP
Retailer 14£1,475 GBP
Retailer 2£1,736 GBP
Retailer 3£1,879 GBP
Retailer 13£1,966 GBP
Retailer 8£2,199 GBP
Retailer 5£2,559 GBP
Retailer 12£2,682 GBP
Retailer 1£3,141 GBP
Taylor and Hart£3,235 GBP

44 data points across 15 retailers

17 retailers£799 GBP to £3,235 GBP

A
Cheapest Retailer
-
£799 GBP
$1,070 USD
A
Retailer 2
-
£869 GBP
$1,164 USD
View
A
Retailer 3
-
£893 GBP
$1,197 USD
View
Final sale: no returns
A
Retailer 4
-
£926 GBP
$1,241 USD
View
Retailer 5
-
£926 GBP
$1,241 USD
View
Price last confirmed 15 days ago
A
Retailer 6
-
£1,056 GBP
$1,415 USD
View
Retailer 7
-
£1,072 GBP
$1,436 USD
View
Price last confirmed 37 days ago
A
Retailer 8
-
£1,341 GBP
View
A
Retailer 9
-
£1,475 GBP
$1,977 USD
View
A
Retailer 10
-
£1,736 GBP
$2,326 USD
View
A
Retailer 11
-
£1,879 GBP
$2,517 USD
View
A
Retailer 12
-
£1,966 GBP
$2,634 USD
View
A
Retailer 13
-
£2,199 GBP
A$4,532 AUD
View
A
Retailer 14
-
£2,559 GBP
View
A
Retailer 15
-
£2,682 GBP
$3,593 USD
View
B+
Retailer 16
-
£3,141 GBP
View
Most Expensive
B+
Taylor and Hart
QCVCQE1 · Oct 31
£3,235 GBP
$4,335 USD
View
16 more retailers have this diamond
Prices start from £799 GBPSave up to £2,437 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
2.51ct Marquise
£799 GBP