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Marquise|Lab Grown|IGI

3.03ct D SI1 Marquise Lab Grown Diamond

VG • D/SI1 • IGI LG843624204

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG843624204

Diamond specifications and retailer prices

From £305 GBP
As of November 4, 2026
Save £1,917 GBP (86%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £2,222 GBP at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 3.03ct lab-grown marquise diamond

This 3.03ct lab-grown marquise sits in the three to five carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG843624204 or 843624204. Listed at 3 retailers as of November 4, 2026, with prices from £305 to £2,222, a £1,917 spread on the same certified stone. Brilliant Earth lists it at £2,222. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

3.03
Carat
D
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG843624204
Dimensions14.20 × 7.52 × 4.88 mm
L/W Ratio1.89
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
14.20 mm7.52 mm3.03 ctD / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG843624204
Side View
Table 59.0%Crown 35.9°Girdle: STK-THKPavilion 40.8°Culet: NoneDepth 64.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: £2,222 GBP|Low: £305 GBP|High: £3,522 GBP|Avg: £1,572 GBP|-36.9%
Brilliant Earth
Retailer 2
Retailer 3
November 6, 2026
Retailer 3£305 GBP
Retailer 2£626 GBP
Brilliant Earth£2,222 GBP

27 data points across 3 retailers

3 retailers£305 GBP to £2,222 GBP

A
Cheapest Retailer
-
£305 GBP
Final sale: no returns
B+
Retailer 2
-
£626 GBP
View
Most Expensive
B
Brilliant Earth
21760287A · Nov 4
£2,222 GBP
$2,990 USD
View
2 more retailers have this diamond
Prices start from £305 GBPSave up to £1,917 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
3.03ct Marquise
£305 GBP