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Marquise|Lab Grown|IGI

3.08ct G SI1 Marquise Lab Grown Diamond

EX • G/SI1 • IGI LG841680599

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG841680599

Diamond specifications and retailer prices

From £279 GBP
As of November 4, 2026
Save £1,392 GBP (83%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £1,672 GBP at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 3.08ct lab-grown marquise diamond

This 3.08ct lab-grown marquise sits in the three to five carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG841680599 or 841680599. Listed at 3 retailers as of November 4, 2026, with prices from £279 to £1,672, a £1,392 spread on the same certified stone. Brilliant Earth lists it at £1,672. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

3.08
Carat
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG841680599
Dimensions14.87 × 7.51 × 4.79 mm
L/W Ratio1.98
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
14.87 mm7.51 mm3.08 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG841680599
Side View
Table 61.0%Crown 35.2°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 63.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: £1,672 GBP|Low: £279 GBP|High: £2,979 GBP|Avg: £1,331 GBP|-43.9%
Brilliant Earth
Retailer 2
Retailer 3
November 4, 2026
Retailer 3£279 GBP
Retailer 2£572 GBP
Brilliant Earth£1,672 GBP

28 data points across 3 retailers

3 retailers£279 GBP to £1,672 GBP

A
Cheapest Retailer
-
£279 GBP
Final sale: no returns
A
Retailer 2
-
£572 GBP
View
Most Expensive
B
Brilliant Earth
21704457A · Nov 4
£1,672 GBP
$2,250 USD
View
2 more retailers have this diamond
Prices start from £279 GBPSave up to £1,392 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
3.08ct Marquise
£279 GBP