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Marquise|Lab Grown|IGI

3.50ct G VS1 Marquise Lab Grown Diamond

EX • G/VS1 • IGI LG752523278

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG752523278

Diamond specifications and retailer prices

From £1,128 GBP
CA$2,103 CAD
As of October 30, 2026
Save £499 GBP (31%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £1,627 GBP at The Diamond Guys · As of November 1, 2026
View at The Diamond Guys

About this 3.5ct lab-grown marquise diamond

This 3.5ct lab-grown marquise sits in the three to five carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG752523278 or 752523278. Listed at 2 retailers as of October 30, 2026, with prices from £1,128 to £1,627, a £499 spread on the same certified stone. The Diamond Guys lists it at £1,627. 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

3.50
Carat
G
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle39.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG752523278
Dimensions16.38 × 7.80 × 4.87 mm
L/W Ratio2.10
Girdle conditionFaceted
Culet sizePointed
Top View
16.38 mm7.80 mm3.50 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG752523278
Side View
Table 63.0%Crown 35°Girdle: MED-STKPavilion 39.9°Culet: NoneDepth 62.4%

Caratlytics Score

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

Last verified: Oct 30
Current: £931 GBP|Low: £396 GBP|High: £2,679 GBP|Avg: £1,018 GBP|-21.1%
Retailer 1
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Retailer 14
The Diamond Guys
August 3, 2026
Retailer 6£497 GBP
Retailer 3£525 GBP
Retailer 4£535 GBP
Retailer 8£705 GBP
Retailer 12£726 GBP
Retailer 14£801 GBP
Retailer 11£926 GBP
Retailer 1£931 GBP
Retailer 5£1,090 GBP
Retailer 9£1,128 GBP
Retailer 10£1,386 GBP
Retailer 2£1,508 GBP
The Diamond Guys£1,627 GBP
Retailer 7£2,435 GBP
Retailer 13£2,571 GBP

57 data points across 15 retailers

2 retailers£1,128 GBP to £1,627 GBP

B+
Cheapest Retailer
-
£1,128 GBP
CA$2,103 CAD
Most Expensive
B
The Diamond Guys
1958037485 · Nov 1
£1,627 GBP
$2,184 USD
View
1 more retailer has this diamond
Prices start from £1,128 GBPSave up to £499 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+
3.50ct Marquise
£1,128 GBP