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Marquise|Lab Grown|IGI

3.14ct E SI1 Marquise Lab Grown Diamond

EX • E/SI1 • IGI LG830691797

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG830691797

Diamond specifications and retailer prices

From £317 GBP
$425 USD
As of October 30, 2026
Save £1,131 GBP (78%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,562 GBP at Michael Trio · As of October 13, 2026
View at Michael Trio

About this 3.14ct lab-grown marquise diamond

This 3.14ct lab-grown marquise sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG830691797 or 830691797. Listed at 10 retailers as of October 26, 2026, with a 357% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

3.14
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG830691797
Dimensions15.65 × 7.52 × 4.71 mm
L/W Ratio2.08
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
15.65 mm7.52 mm3.14 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG830691797
Side View
Table 58.0%Crown 34.5°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 62.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £1,562 GBP|Low: £299 GBP|High: £1,562 GBP|Avg: £879 GBP|+3.7%
Michael Trio
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 31, 2026
Retailer 8£317 GBP
Retailer 6£355 GBP
Retailer 3£484 GBP
Retailer 4£621 GBP
Retailer 10£678 GBP
Retailer 2£1,105 GBP
Retailer 7£1,105 GBP
Retailer 9£1,266 GBP
Retailer 5£1,448 GBP
Michael Trio£1,562 GBP

35 data points across 10 retailers

10 retailers£317 GBP to £1,448 GBP

A
Cheapest Retailer
-
£317 GBP
$425 USD
A
Retailer 2
-
£355 GBP
$476 USD
View
A
Retailer 3
-
£484 GBP
View
A
Retailer 4
-
£621 GBP
€793 EUR
View
A
Retailer 5
-
£678 GBP
$908 USD
View
B
Retailer 6
-
£1,105 GBP
$1,480 USD
View
B
Retailer 7
-
£1,105 GBP
$1,480 USD
View
B
Retailer 8
-
£1,266 GBP
$1,696 USD
View
B
Retailer 9
-
£1,448 GBP
View
Most Expensive
Michael Trio
1901723019 · Oct 13
£1,562 GBP
SGD 2,829 SGD
View
Price last confirmed 18 days ago
9 more retailers have this diamond
Prices start from £317 GBPSave up to £1,131 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
3.14ct Marquise
£317 GBP