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Marquise|Lab Grown|IGI

2.51ct E IF Marquise Lab Grown Diamond

ID • E/IF • IGI LG818684305

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG818684305

Diamond specifications and retailer prices

From £2,060 GBP
$2,760 USD
As of October 31, 2026
Save £5,852 GBP (74%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £7,912 GBP at With Clarity · As of October 31, 2026
View at With Clarity

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 LG818684305 or 818684305. Listed at 13 retailers as of October 31, 2026, with prices from £2,060 to £7,912, a £5,852 spread on the same certified stone. With Clarity lists it at £7,912. 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 angle35.1°
Pavilion angle39.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818684305
Dimensions13.93 × 7.11 × 4.47 mm
L/W Ratio1.96
Girdle conditionFaceted
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
13.93 mm7.11 mm2.51 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818684305
Side View
Table 59.0%Crown 35.1°Girdle: MED-STKPavilion 39.8°Culet: NoneDepth 62.9%

Caratlytics Score

How it works →
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 31
Current: £5,464 GBP|Low: £2,282 GBP|High: £7,912 GBP|Avg: £4,536 GBP|-1.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
With Clarity
November 1, 2026
Retailer 10£2,282 GBP
Retailer 11£2,493 GBP
Retailer 4£2,787 GBP
Retailer 8£3,082 GBP
Retailer 6£3,255 GBP
Retailer 7£3,426 GBP
Retailer 5£5,288 GBP
Retailer 3£5,358 GBP
Retailer 1£5,464 GBP
Retailer 9£5,986 GBP
Retailer 2£7,126 GBP
With Clarity£7,912 GBP

34 data points across 12 retailers

13 retailers£2,060 GBP to £7,912 GBP

A
Cheapest Retailer
-
£2,060 GBP
$2,760 USD
A
Retailer 2
-
£2,282 GBP
$3,058 USD
View
A
Retailer 3
-
£2,493 GBP
HK$26,100 HKD
View
A
Retailer 4
-
£2,787 GBP
View
B+
Retailer 5
-
£3,082 GBP
$4,130 USD
View
B+
Retailer 6
-
£3,255 GBP
€4,154 EUR
View
B+
Retailer 7
-
£3,426 GBP
$4,590 USD
View
B
Retailer 8
-
£5,288 GBP
A$10,901 AUD
View
Retailer 9
-
£5,358 GBP
$7,179 USD
View
Price last confirmed 9 days ago
B+
Retailer 10
-
£5,464 GBP
View
B
Retailer 11
-
£5,986 GBP
$8,020 USD
View
B
Retailer 12
-
£7,126 GBP
$9,549 USD
View
Most Expensive
B
With Clarity
818684305 · Oct 31
£7,912 GBP
$10,601 USD
View
12 more retailers have this diamond
Prices start from £2,060 GBPSave up to £5,852 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
£2,060 GBP