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Marquise|Lab Grown|IGI

5.12ct E VS1 Marquise Lab Grown Diamond

EX • E/VS1 • IGI LG821655131

Certificate IGI LG821655131

Diamond specifications and retailer prices

From £4,188 GBP
$5,612 USD
As of October 31, 2026
Save £1,834 GBP (30%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £6,023 GBP at Zales · As of October 30, 2026
View at Zales

About this 5.12ct lab-grown marquise diamond

This 5.12ct lab-grown marquise sits in the over five carat band, graded E colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG821655131 or 821655131. Listed at 4 retailers as of October 30, 2026, with prices from £4,188 to £6,023, a £1,834 spread on the same certified stone. Zales lists it at £6,023. 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

5.12
Carat
E
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG821655131
Dimensions16.94 × 9.38 × 5.70 mm
L/W Ratio1.81
Top View
16.94 mm9.38 mm5.12 ctE / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG821655131
Side View
Table 61.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 60.8%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
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Price History

Last verified: Oct 31
Current: £5,680 GBP|Low: £4,188 GBP|High: £6,023 GBP|Avg: £5,521 GBP
Retailer 1
Retailer 2
Retailer 3
Zales
September 28, 2026
Retailer 2£4,188 GBP
Retailer 1£5,680 GBP
Retailer 3£6,023 GBP
Zales£6,023 GBP

3 data points across 4 retailers

4 retailers£4,188 GBP to £6,023 GBP

B
Cheapest Retailer
-
£4,188 GBP
$5,612 USD
B
Retailer 2
-
£5,680 GBP
$7,610 USD
View
B
Retailer 3
-
£6,023 GBP
$8,070 USD
View
Most Expensive
B
Zales
529255431 · Oct 30
£6,023 GBP
$8,070 USD
View
3 more retailers have this diamond
Prices start from £4,188 GBPSave up to £1,834 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
5.12ct Marquise
£4,188 GBP