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Marquise|Lab Grown|IGI

2.78ct E IF Marquise Lab Grown Diamond

ID • E/IF • IGI LG851649510

Certificate IGI LG851649510

Diamond specifications and retailer prices

From £1,640 GBP
$2,198 USD
As of November 1, 2026
Save £5,507 GBP (77%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £7,148 GBP at Riddles Jewelry · As of November 1, 2026
View at Riddles Jewelry

About this 2.78ct lab-grown marquise diamond

This 2.78ct 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 LG851649510 or 851649510. Listed at 5 retailers as of November 1, 2026, with prices from £1,640 to £7,148, a £5,507 spread on the same certified stone. Riddles Jewelry lists it at £7,148. 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

2.78
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG851649510
Dimensions14.32 × 7.34 × 4.61 mm
L/W Ratio1.95
Top View
14.32 mm7.34 mm2.78 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG851649510
Side View
Table 61.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 62.8%

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: Nov 1
Current: £2,360 GBP|Low: £1,640 GBP|High: £7,148 GBP|Avg: £4,002 GBP
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Riddles Jewelry
November 1, 2026
Retailer 2£1,640 GBP
Retailer 1£2,360 GBP
Retailer 3£3,224 GBP
Retailer 4£5,208 GBP
Riddles Jewelry£7,148 GBP

2 data points across 5 retailers

5 retailers£1,640 GBP to £7,148 GBP

A
Cheapest Retailer
-
£1,640 GBP
$2,198 USD
A
Retailer 2
-
£2,360 GBP
$3,162 USD
View
A
Retailer 3
-
£3,224 GBP
$4,320 USD
View
B+
Retailer 4
-
£5,208 GBP
A$10,736 AUD
View
Most Expensive
B
Riddles Jewelry
1998704627 · Nov 1
£7,148 GBP
$9,577 USD
View
4 more retailers have this diamond
Prices start from £1,640 GBPSave up to £5,507 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
2.78ct Marquise
£1,640 GBP