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Marquise|Lab Grown|IGI

0.78ct D IF Marquise Lab Grown Diamond

EX • D/IF • IGI LG826603903

Certificate IGI LG826603903

Diamond specifications and retailer prices

From £739 GBP
As of November 3, 2026
Save £247 GBP (25%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £985 GBP at Kay Jewelers · As of November 3, 2026
View at Kay Jewelers

About this 0.78ct lab-grown marquise diamond

This 0.78ct lab-grown marquise sits in the just-under-one-carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG826603903 or 826603903. Listed at 4 retailers as of November 3, 2026, with prices from £739 to £985, a £247 spread on the same certified stone. Kay Jewelers lists it at £985. Flawless clarity in sub-one-carat stones is rarely visible to the naked eye over VS1, so you are paying a meaningful premium for grade rather than appearance.

The 4Cs

0.78
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG826603903
Dimensions9.37 × 4.85 × 3.04 mm
L/W Ratio1.93
Top View
9.37 mm4.85 mm0.78 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG826603903
Side View
Table 57.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 62.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 3
Current: £985 GBP|Low: £739 GBP|High: £985 GBP|Avg: £901 GBP
Kay Jewelers
Retailer 2
Retailer 3
Retailer 4
September 28, 2026
Retailer 4£739 GBP
Retailer 2£807 GBP
Kay Jewelers£985 GBP
Retailer 3£985 GBP

3 data points across 4 retailers

4 retailers£739 GBP to £985 GBP

B+
Cheapest Retailer
-
£739 GBP
B
Retailer 2
-
£807 GBP
View
B
Retailer 3
-
£985 GBP
View
Most Expensive
B
Kay Jewelers
259776939 · Nov 3
£985 GBP
$1,330 USD
View
3 more retailers have this diamond
Prices start from £739 GBPSave up to £247 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.

B+
0.78ct Marquise
£739 GBP